[tiff] zstd 1.5.2#1 tiff feature config file name update

[AbdulAbCellera]

Since zstd 1.5.2#1, the zstd port has removed the renaming of CMake config files #22822. This change causes tiff[zstd] to fail if zstd is not added as an override with pinned to zstd 1.5.2#1. I see this issue only on Linux though.

The error is

CMake Error at vcpkg/scripts/buildsystems/vcpkg.cmake:843 (_find_package):
[cmake]   Could not find a package configuration file provided by "ZSTD" with any of
[cmake]   the following names:
[cmake] 
[cmake]     ZSTDConfig.cmake
[cmake]     zstd-config.cmake
[cmake] 
[cmake]   Add the installation prefix of "ZSTD" to CMAKE_PREFIX_PATH or set
[cmake]   "ZSTD_DIR" to a directory containing one of the above files.  If "ZSTD"
[cmake]   provides a separate development package or SDK, be sure it has been
[cmake]   installed.
[cmake] Call Stack (most recent call first):
[cmake]   vcpkg_installed/x64-linux-<>/share/tiff/vcpkg-cmake-wrapper.cmake:33 (find_package)
[cmake]   vcpkg/scripts/buildsystems/vcpkg.cmake:797 (include)
[cmake]   CMakeLists.txt:50 (find_package)
[cmake] 
[cmake] 
[cmake] -- Configuring incomplete, errors occurred!

The fix is very easy. find_package(ZSTD ...) should be replaced with a lowercase find_package(zstd ...).

vcpkg/ports/tiff/vcpkg-cmake-wrapper.cmake.in

Line 33 in 6adca01

find_package(ZSTD CONFIG ${z_vcpkg_tiff_find_options})

[dg0yt]

On my x64-linux, tiff configures and builds as expected:

--   ZSTD support:                       Requested:ON Availability:TRUE Support:TRUE

Building the current version of tiff simply falls back on its own FindZSTD.cmake.

The actual problem is not building but using TIFF. That's where the wrapper currently tries to use the wrong config.