chore(bazel): Update WORKSPACE files for rules_gapic, gax_java, gener…

…ator_java versions (#182)

* chore(bazel): Update WORKSPACE files for rules_gapic, gax_java, generator_java versions

PiperOrigin-RevId: 472750037

Source-Link: googleapis/googleapis@88f2ea3

Source-Link: https://github.com/googleapis/googleapis-gen/commit/230a5588306aae18fe8f2a57f14d4039ad72c901
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