Bazel

Rust: fix proto! msgtype matcher to look for :: separated idents inst… #878

Job	Run time
test / matrix-prep-bazelversion	7s
test / matrix-prep-os	1s
test / test (ubuntu-latest, examples, true)	5m 18s
test / test (ubuntu-latest, examples, false)	9m 5s
test / test (ubuntu-latest, 6.4.0, examples, true)	5m 20s
test / test (ubuntu-latest, 6.4.0, examples, false)	8m 41s
test / test (windows-latest, examples, true)	10m 28s
test / test (windows-latest, examples, false)	9m 24s
test / test (macos-latest, examples, true)	5m 49s
test / test (macos-latest, examples, false)	26m 24s
	1h 20m 37s

Provide feedback