Fix bazel pre-merge check

[tpopp]

linkopt can't be overriden with empty strings, so workaround differently.

[tpopp]

Remove overlooked line.

[tpopp]

Move flag from generic_clang to ci until pre-merge is fixed

[tpopp]

Move fuse-ld to ci

[GMNGeoffrey]

So the issue we're trying to solve is that the pre-merge check is still running on the old runners and using "--config=rbe", right? Please add that info to the description and link your PR (https://github.com/google/llvm-premerge-checks/pull/414) attempting to fix this in the pre-merge checks repo.

[tpopp]

Unfortunately, it looks like the version of clang on the pre-merge bazel build bot is too old, or similar, so I am abandoning this attempted workaround.

utils/bazel/.bazelrc

 build:ci --test_tag_filters=-nobuildkite
 
 # Show as many errors as possible.
 build:ci --keep_going
 
 # Show test errors.
 build:ci --test_output=errors
 
+# Workaround bazel pre-merge failures.
+# RBE was removed. Instead ci should be used, but provide common values here.
+
+build:rbe --config=ci
+
+# Undo linker settings in generic_clang that are not supported in the current
+# environment of the bazel pre-merge checks. Remove once the docker container is
+# updated with clang-13 and lld-13
+build:rbe --linkopt="" --host_linkopt=""
+build:rbe --remote_cache=https://storage.googleapis.com/llvm-bazel-cache
+build:rbe --google_default_credentials=true
 ###############################################################################
 
 # The user.bazelrc file is not checked in but available for local mods.
 # Always keep this at the end of the file so that user flags override.
 try-import %workspace%/user.bazelrc