fix: gradle lockfile parser groupId handling

[kzantow]

This PR corrects an issue where the Gradle lockfile parser was neither taking into account the groupId nor creating a JavaMetadata object, despite indicating the MetadataType was java metadata. This resulted in, among other things, CPEs being generated incorrectly for the entries in the lockfile.

Fixes: #1957

[github-actions]

Benchmark Test Results

Benchmark results from the latest changes vs base branch

goos: linux%0Agoarch: amd64%0Apkg: github.com/anchore/syft/test/integration%0Acpu: Intel(R) Xeon(R) Platinum 8272CL CPU @ 2.60GHz%0A                                                              │ ./.tmp/benchmark-707b71f.txt │%0A                                                              │            sec/op            │%0AImagePackageCatalogers/alpmdb-cataloger-2                                        12.18m ± 2%25%0AImagePackageCatalogers/apkdb-cataloger-2                                         712.9µ ± 4%25%0AImagePackageCatalogers/binary-cataloger-2                                        205.6µ ± 1%25%0AImagePackageCatalogers/dpkgdb-cataloger-2                                        623.8µ ± 3%25%0AImagePackageCatalogers/dotnet-portable-executable-cataloger-2                    22.85µ ± 4%25%0AImagePackageCatalogers/go-module-binary-cataloger-2                              97.70µ ± 9%25%0AImagePackageCatalogers/java-cataloger-2                                          13.67m ± 1%25%0AImagePackageCatalogers/graalvm-native-image-cataloger-2                          97.65µ ± 3%25%0AImagePackageCatalogers/javascript-package-cataloger-2                            403.5µ ± 3%25%0AImagePackageCatalogers/nix-store-cataloger-2                                     286.4µ ± 3%25%0AImagePackageCatalogers/php-composer-installed-cataloger-2                        823.4µ ± 1%25%0AImagePackageCatalogers/portage-cataloger-2                                       495.5µ ± 2%25%0AImagePackageCatalogers/python-package-cataloger-2                                3.443m ± 1%25%0AImagePackageCatalogers/r-package-cataloger-2                                     216.6µ ± 3%25%0AImagePackageCatalogers/rpm-db-cataloger-2                                        569.7µ ± 1%25%0AImagePackageCatalogers/ruby-gemspec-cataloger-2                                  950.5µ ± 1%25%0AImagePackageCatalogers/sbom-cataloger-2                                          122.8µ ± 1%25%0Ageomean                                                                          500.5µ%0A%0A                                                              │ ./.tmp/benchmark-707b71f.txt │%0A                                                              │             B/op             │%0AImagePackageCatalogers/alpmdb-cataloger-2                                       5.122Mi ± 0%25%0AImagePackageCatalogers/apkdb-cataloger-2                                        204.7Ki ± 0%25%0AImagePackageCatalogers/binary-cataloger-2                                       30.49Ki ± 0%25%0AImagePackageCatalogers/dpkgdb-cataloger-2                                       172.5Ki ± 0%25%0AImagePackageCatalogers/dotnet-portable-executable-cataloger-2                   3.696Ki ± 0%25%0AImagePackageCatalogers/go-module-binary-cataloger-2                             9.906Ki ± 0%25%0AImagePackageCatalogers/java-cataloger-2                                         2.841Mi ± 0%25%0AImagePackageCatalogers/graalvm-native-image-cataloger-2                         8.594Ki ± 0%25%0AImagePackageCatalogers/javascript-package-cataloger-2                           94.21Ki ± 0%25%0AImagePackageCatalogers/nix-store-cataloger-2                                    49.14Ki ± 0%25%0AImagePackageCatalogers/php-composer-installed-cataloger-2                       186.6Ki ± 0%25%0AImagePackageCatalogers/portage-cataloger-2                                      119.9Ki ± 0%25%0AImagePackageCatalogers/python-package-cataloger-2                               1.003Mi ± 0%25%0AImagePackageCatalogers/r-package-cataloger-2                                    53.29Ki ± 0%25%0AImagePackageCatalogers/rpm-db-cataloger-2                                       180.9Ki ± 0%25%0AImagePackageCatalogers/ruby-gemspec-cataloger-2                                 144.0Ki ± 0%25%0AImagePackageCatalogers/sbom-cataloger-2                                         14.20Ki ± 0%25%0Ageomean                                                                         100.5Ki%0A%0A                                                              │ ./.tmp/benchmark-707b71f.txt │%0A                                                              │          allocs/op           │%0AImagePackageCatalogers/alpmdb-cataloger-2                                        87.74k ± 0%25%0AImagePackageCatalogers/apkdb-cataloger-2                                         4.181k ± 0%25%0AImagePackageCatalogers/binary-cataloger-2                                         848.0 ± 0%25%0AImagePackageCatalogers/dpkgdb-cataloger-2                                        3.141k ± 0%25%0AImagePackageCatalogers/dotnet-portable-executable-cataloger-2                     132.0 ± 0%25%0AImagePackageCatalogers/go-module-binary-cataloger-2                               281.0 ± 0%25%0AImagePackageCatalogers/java-cataloger-2                                          40.19k ± 0%25%0AImagePackageCatalogers/graalvm-native-image-cataloger-2                           228.0 ± 0%25%0AImagePackageCatalogers/javascript-package-cataloger-2                            1.342k ± 0%25%0AImagePackageCatalogers/nix-store-cataloger-2                                      895.0 ± 0%25%0AImagePackageCatalogers/php-composer-installed-cataloger-2                        4.079k ± 0%25%0AImagePackageCatalogers/portage-cataloger-2                                       2.268k ± 0%25%0AImagePackageCatalogers/python-package-cataloger-2                                16.44k ± 0%25%0AImagePackageCatalogers/r-package-cataloger-2                                      929.0 ± 0%25%0AImagePackageCatalogers/rpm-db-cataloger-2                                        3.989k ± 0%25%0AImagePackageCatalogers/ruby-gemspec-cataloger-2                                  2.447k ± 0%25%0AImagePackageCatalogers/sbom-cataloger-2                                           394.0 ± 0%25%0Ageomean                                                                          2.060k