[solaris] Explicitly opt out of the runtimes build

[DavidSpickett]

Summary

As described in https://github.com/llvm/llvm-project/issues/54196
and https://github.com/llvm/llvm-project/issues/57781, there are
ongoing issues with the runtimes build for Solaris and others.

This patch does not change what these bots do, just makes it explicit
so that when the default switches in future they are not effected.

[DavidSpickett]

If anyone needs to figure out why these opt out, I hope a git blame and reading the commit message will be enough info. Let me know if I should include anything else.

[ro]

LGTM, thanks.

[DavidSpickett]

Landed as https://github.com/llvm/llvm-zorg/commit/bb4152335dd9f16b0f679856bafed8434134a70b.

buildbot/osuosl/master/config/builders.py

# VE builders.
     'tags' : ["clang"],
     'workernames' : ["solaris11-amd64"],
     'builddir': "clang-solaris11-amd64",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     jobs=8,
                     clean=False,
                     timeout=1800,
                     checkout_lld=False,
+                    enable_runtimes=None,
                     extra_cmake_args=['-DLLVM_ENABLE_ASSERTIONS=ON',
                                     '-DLLVM_TARGETS_TO_BUILD=X86',
                                     '-DLLVM_HOST_TRIPLE=amd64-pc-solaris2.11',
                                     '-DLLVM_PARALLEL_LINK_JOBS=4'])},
 
     {'name' : "clang-solaris11-sparcv9",
     'tags' : ["clang"],
     'workernames' : ["solaris11-sparcv9"],
     'builddir': "clang-solaris11-sparcv9",
     'factory' : ClangBuilder.getClangCMakeBuildFactory(
                     jobs=8,
                     clean=False,
                     timeout=1800,
                     checkout_lld=False,
+                    enable_runtimes=None,
                     extra_cmake_args=['-DLLVM_ENABLE_ASSERTIONS=ON',
                                     '-DLLVM_TARGETS_TO_BUILD=Sparc',
                                     '-DLLVM_HOST_TRIPLE=sparcv9-sun-solaris2.11',
                                     '-DLLVM_PARALLEL_LINK_JOBS=4'])},
 
 # Builders for ML-driven compiler optimizations.
 
     # Development mode build bot: tensorflow C APIs are present, and