message: ci: bring JVM heap limit back
  Fixes some CI flakes in ASAN/TSAN caused by
diff: # Envoy specific Bazel build/test options.
  +
  +# Bazel doesn't need more than 200MB of memory for local build based on memory profiling:
  +# https://docs.bazel.build/versions/master/skylark/performance.html#memory-profiling
  +# The default JVM max heapsize is 1/4 of physical memory up to 32GB which could be large
  +# enough to consume all memory constrained by cgroup in large host, which is the case in CircleCI.
  +# Limiting JVM heapsize here to let it do GC more when approaching the limit to
  +# leave room for compiler/linker.
  +# The number 2G is choosed heuristically to both support in CircleCI and large enough for RBE.
  +# Startup options cannot be selected via config.
  +startup --host_jvm_args=-Xmx2g
  +
  build --workspace_status_command=bazel/get_workspace_status
  build --experimental_remap_main_repo
  build --experimental_local_memory_estimate
  