[CI] Upload lit test timing files (llvm#580)

This patch makes it so that the postcommit builders upload the lit
timing files to the GCS buckets. Once the caches get populated we can
add support to the premerge builders for pulling this in.

Author: boomanaiden154

zorg/buildbot/builders/annotated/premerge/dispatch_job.py

@@ -110,6 +110,7 @@ def start_build_linux(commit_sha: str, bucket_name: str, k8s_client) -> str:
         "export SCCACHE_IDLE_TIMEOUT=0",
         "sccache --start-server",
         './.ci/monolithic-linux.sh "bolt;clang;clang-tools-extra;flang;libclc;lld;lldb;llvm;mlir;polly" "check-bolt check-clang check-clang-tools check-flang check-lld check-lldb check-llvm check-mlir check-polly" "compiler-rt;libc;libcxx;libcxxabi;libunwind" "check-compiler-rt check-libc" "check-cxx check-cxxabi check-unwind" "OFF"',
+        "python .ci/cache_lit_timing_files.py upload",
         "echo BUILD FINISHED",
     ]
     start_build(
@@ -133,6 +134,7 @@ def start_build_windows(commit_sha: str, bucket_name: str, k8s_client):
         "export SCCACHE_IDLE_TIMEOUT=0",
         "sccache --start-server",
         '.ci/monolithic-windows.sh "clang;clang-tools-extra;libclc;lld;llvm;mlir;polly" "check-clang check-clang-tools check-lld check-llvm check-mlir check-polly"',
+        "python .ci/cache_lit_timing_files.py upload",
         "echo BUILD FINISHED",
     ]
     bash_command = f"bash -c \"{';'.join(bash_commands)}\"\""