Ref: b/332425004
Adding a workaround for x86 builds that run into trouble with using an installed abseil library.
Closes#36220
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36220 from yashykt:FixPortabilityLinux 672ccdb3ff
PiperOrigin-RevId: 621259080
Earlier, the tests just had bazel support. With CMake support added in #36063, we can also add CI CMake support for the tests. A major benefit of this is that we also get coverage for the various platforms that we test from our portability test suite.
Closes#36087
COPYBARA_INTEGRATE_REVIEW=https://github.com/grpc/grpc/pull/36087 from yashykt:OTelCISupport b28fbe02e5
PiperOrigin-RevId: 615543685
* only support cmake for CLanguage in run_tests.py
* add support for run_tests.py build step environ
* switch C/C++ run_tests.py build to build_cxx script
* CLanguage cleanup
* build C# entirely with build_csharp script
* move entire PHP build to build_php.sh
* fixup C# build on linux and mac
* run_dep_checks Makefile target is deprecated
* get rid of the "makefile" logic in run_tests.py
* fixup C# build on linux and mac
* XML_REPORT env variable is useless for --use_docker runs
* add a TODO
* move "main" functionality towards end of run_tests.py
* use self.args instead of global
* yapf format
* remove the no longer useful --update_submodules features of run_tests.py
* fix check_epollexclusive check in run_tests.py