* upgrade ruby docker images to debian 11
* upgrade C# docker images to debian11
* update sanity dockerimage to debian11
* upgrade cxx interop to debian11
* add ccache to python interop images
* enable use of ccache for interop tests
* adjust run_tests.py to new docker images
* add ccache to rake-compiler-dock docker images
* improve prepare_ccache_symlinks_rc
* enable use of ccache in rake-compiler-dock docker containers
* add ccache support for python_manylinux2014_aarch64
* add ccache support for python_linux_armv7
* deduplicate python3.9 install
* ccache for crosscompiled darwin gems is broken
* fix bash -l resetting of PATH in grpc_artifact_python_linux_armv7
* Let's see if the aarch64 manylinux bug is fixed or not
* rename aarch64 image back to manylinux2014 for consistency
* fix C# aarch64 artifact build
Co-authored-by: Lidi Zheng <lidiz@google.com>
* generate separate .so with/without debug symbols for grpc_csharp_ext
* add linux .dbginfo.so libraries to Grpc.Core.NativeDebug package
* fix aarch64 grpc_csharp_ext stripping
* lots of linux artifact build jobs are currently timing out