tree d53f37585afa91497866c4a8fdaab57014392aa8
parent 90fe1b2bb2604e2acb3db56f18a4532967aa1f89
author trybka <trybka@google.com> 1649865408 -0700
committer Copybara-Service <copybara-worker@google.com> 1649865493 -0700

## Starlark `cc_test` fixes.

* Restructure `cc_test` to use a toolchain alias. This will allow `cc_test` to work in Bazel (and tests) without a "dummy" toolchain needing to be registered.
This makes `cc_test` use the legacy flow when toolchains are not registered--requiring an additional flag if they are.
This is a temporary measure to permit switching off `native.cc_test` before [Optional Toolchains](https://github.com/bazelbuild/bazel/issues/14726) lands.

* Add coverage-related tools (e.g. collect_cc_coverage.sh) necessary for Bazel to collect coverage from cc_test(s)

PiperOrigin-RevId: 441494074