Prepare 2.12.0.dev1

[Eric-Arellano]

[ci skip-rust]

[stuhood]

I'm fine with bumping all of these deprecations until more of the 2.11.x issues are resolved (since removing them will make cherry-picking harder anyway).

[Eric-Arellano]

Internal (put these in a PR comment for review, not the release notes)

• [internal] BSP: use seperate config file for defining groups for BSP build targets (#14943)

• [internal] softwrap pants.jvm (#14989)

• [internal] Pass prior_formatter_result in lintto FmtRequest (#14984)

• Prepare 2.11.0rc1 (#14916)

• Bump strum_macros from 0.23.1 to 0.24.0 in /src/rust/engine (#14955)

• Bump crossbeam-channel from 0.5.2 to 0.5.4 in /src/rust/engine (#14952)

• Bump env_logger from 0.5.13 to 0.9.0 in /src/rust/engine (#14953)

• Remove dead kotlin glob, and fail for unmatched globs. (#14958)

• Bump fuser from 0.10.0 to 0.11.0 in /src/rust/engine (#14743)

• Bump bincode from 1.3.1 to 1.3.3 in /src/rust/engine (#14927)

• Bump tokio-util from 0.6.9 to 0.7.1 in /src/rust/engine (#14950)

• Bump rlimit from 0.3.0 to 0.7.0 in /src/rust/engine (#14926)

• Bump pyo3 from 0.16.0 to 0.16.2 in /src/rust/engine (#14924)

• Bump time from 0.3.7 to 0.3.9 in /src/rust/engine (#14881)

• Bump os_pipe from 1.0.0 to 1.0.1 in /src/rust/engine (#14883)

• Bump hyper from 0.14.17 to 0.14.18 in /src/rust/engine (#14882)

• Bump tokio-rustls from 0.23.2 to 0.23.3 in /src/rust/engine (#14884)

• Bump strum from 0.20.0 to 0.24.0 in /src/rust/engine (#14925)

• Bump timeout for backends integration test (#14933)

• Upgrade to Pex 2.1.75 for VCS lock support and deadlock fix (#14970)

• Fix ./pants --version for pantsbuild.pants PEX (#14963)

• upgrade to Rust v1.59.0 (#14608)

• [internal] kotlin: add compilation rules (#14939)

• [internal] add start of a Kotlin backend (#14918)

• Frontload label checks to occur before any other jobs. (#14935)

• Fix a breakage in building release pexes. (#14922)

• Store workunits as a DAG rather than a tree (#14856)

• Fix typo (#14945)

• Add Helm chart name to lint partition description (#15001)

• Prevent ambiguous LintFilesRequest and LintTargetsRequest names (#14920)