Drop clang-cl compilation target for the time being (#18406)
Drop clang-cl compilation target for the time being (#18406)

Unfortunately, a change in the flags or behavior of the bazel 4.2.1
release has caused a regression in the ability to compile grpc under clang-cl.

The primary output of envoy-static.exe is generated by MSVC, the clang-cl
alternative is an observation point to see what the MS compiler might be
doing wrong based on our general clang compiler development strategy.
At the moment, it is a blocker.

This patch should be reverted once we've uncovered what's changed with
bazel 4.2.1; this isn't entirely on the compiler, the same error occurs on
clang-cl versions 11 and 12, not on msvc, and does not occur in clang for linux.

See issue #18407

Signed-off-by: William A Rowe Jr <6b594a7cef7896b2a5c8742c6f375a4f1966bff1@vmware.com>
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