Bazel

Move the windows path length workarounds out of protobuf-ci #903

Job	Run time
test / matrix-prep-bazelversion	6s
test / matrix-prep-os	4s
test / test (ubuntu-latest, examples, true)	5m 17s
test / test (ubuntu-latest, examples, false)	8m 20s
test / test (ubuntu-latest, 6.4.0, examples, true)	5m 21s
test / test (ubuntu-latest, 6.4.0, examples, false)	8m 49s
test / test (windows-latest, examples, true)	10m 36s
test / test (windows-latest, examples, false)	8m 39s
test / test (macos-latest, examples, true)	6m 43s
test / test (macos-latest, examples, false)	26m 4s
	1h 19m 59s

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