Update bazlets to Gerrit API 2.14.20

* Update the WORKSPACE to use the released API instead of snapshot
* Use skylark instead of native.git_repository
* Move now-unsupported bazel.rc content to .bazelrc
* The same changes need to be applied to the files in the subdirectories

Thanks to David P for his comments on [1] for pointers on the above

[1] https://gerrit-review.googlesource.com/c/plugins/examples/+/199712

Change-Id: I506d04796ed78a8eff1bc037048b890f04224465
100 files changed