Refactor remote package to only have one remote cache impl.

Historically the remote package shipped two implementations
for remote caching: GrpcRemoteCache and SimpleBlobStoreActionCache.
Today there is no good reason to keep this structure and the
duplication of code and tests that comes with it. This is the
final refactoring of a long series:

 * 5fc91a7
 * 12ebb84
 * 8ac6bdc
 * 9fb83b4
 * 36611c3
 * a6b5b05
 * d40933d
 * 797f292

This change makes it so that there is one RemoteCache that
has a RemoteCacheClient. The RemoteCacheClient has one
implementation per caching protocol:

 * DiskCacheClient (formerly OnDiskBlobStore)
 * GrpcCacheClient (formerly GrpcRemoteCache)
 * HttpCacheClient (formerly HttpBlobStore)
 * CombinedDiskHttpCacheClient (formerly CombinedDiskHttpBlobStore)

A single RemoteCache type for all protocols will allow
composition of caching protocols. In particular, grpc and disk
caching. Additionally, this change will allow us to fix a longstanding
bug where for the HTTP

Closes #10200.

PiperOrigin-RevId: 279723411
46 files changed
tree: a25b1a49a7ff2ae69815210bfaf066e9fe98f776
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitattributes
  10. .gitignore
  11. AUTHORS
  12. BUILD
  13. CHANGELOG.md
  14. CODEOWNERS
  15. combine_distfiles.py
  16. combine_distfiles_to_tar.sh
  17. compile.sh
  18. CONTRIBUTING.md
  19. CONTRIBUTORS
  20. distdir.bzl
  21. ISSUE_TEMPLATE.md
  22. LICENSE
  23. README.md
  24. WORKSPACE
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