Roll Dart Protobuf Support from 66593ca5a4d1 to 585878516d90 (5 revisions)

https://dart.googlesource.com/protobuf/+log/66593ca5a4d1..585878516d90

2022-07-05 [email protected] Documentation tweaks
2022-07-05 [email protected] Move a test to its test group
2022-07-03 [email protected] Move annotations to a new file
2022-07-03 [email protected] Update a test (sync from internal)
2022-07-03 [email protected] Make `CodedBufferWriter._valueTypeIndex` static

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Tbr: [email protected]
Change-Id: I474f7b051224fa959f45a15cfd4216e69f7cf749
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/250682
Reviewed-by: Kevin Moore <[email protected]>
Commit-Queue: Devon Carew <[email protected]>

Author: DEPS Autoroller

DEPS

@@ -135,7 +135,7 @@ vars = {
   "path_rev": "7a0ed40280345b1c11df4c700c71e590738f4257",
   "ply_rev": "604b32590ffad5cbb82e4afef1d305512d06ae93",
   "pool_rev": "fa84ddd0e39f45bf3f09dcc5d6b9fbdda7820fef",
-  "protobuf_rev": "66593ca5a4d163b2f9a469a2b6368e12a710e550",
+  "protobuf_rev": "585878516d90b973ba47e2ffa295814ccaa19d3d",
   "pub_rev": "9bf4289d6fd5d6872a8929d6312bbd7098f3ea9c", # manually rev'd
   "pub_semver_rev": "5c0b4bfd5ca57fe16f1319c581dc8c882e9b8cb2",
   "root_certificates_rev": "692f6d6488af68e0121317a9c2c9eb393eb0ee50",