[glslang] update to 13.1.1, opt feature [shaderc] update to 2023.7

[moritz-h]

• Changes comply with the maintainer guide
• SHA512s are updated for each updated download
• The "supports" clause reflects platforms that may be fixed by this new version
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

Update glslang to 13.1.1. Upstream changed the behaviour of the ENABLE_OPT option to require spirv-tools more explicitly, see https://github.com/KhronosGroup/glslang/blob/13.1.1/CMakeLists.txt#L268-L283.
Previously it was just used when found, otherwise not. Therefore, add an opt feature depending on the spirv-tools port.
In addition, there is a problem setting correct include dirs with external spirv-tools, a patch for this is merged upstream to latest main, but added as patch here for backporting to 13.1.1.

[moritz-h]

Converting to draft due to shaderc regression.

[moritz-h]

Another glslang patch was required, is submitted upstream: KhronosGroup/glslang#3420.
After that, shaderc did not compile because glslang now requires C++17 in public headers used by shaderc. So bump shaderc version as this was fixed upstream and the version of shaderc in vcpkg is already 2.5 years old. Let's see if CI now passes.

[BillyONeal]

Thanks for the update!