Run gclient verify in CI before gclient sync, fix existing violations

[jmagman]

Discovered during flutter/engine#36634 (comment), running gclient verify reports many violations, including that some of the engine DEPS hosts are not in allowed_hosts. Fix all existing violations, and update scripts to run gclient verify in CI before sync to prevent future violations from slipping in.

[godofredoc]

@jmagman should infra coordinate with you for the engine side changes? if not @zanderso who should be a good POC in the engine side for these fixes?

[zanderso]

This should be combined with the effort to stop pulling directly from GitHub.

[godofredoc]

This is the bug tracking mirrors for reference: #110142

[godofredoc]

Remaining violations:

src at https://github.com/flutter/buildroot.git@c9c2b77c9520903741ccda2fe12f773408a76c94
	src/third_party/benchmark at https://github.com/google/benchmark@431abd149fd76a072f821913c0340137cc755f36
	src/third_party/boringssl at https://github.com/dart-lang/boringssl_gen.git@ced85ef0a00bbca77ce5a91261a5f2ae61b1e62f
	src/third_party/flatbuffers at https://github.com/google/flatbuffers.git@0a80646371179f8a7a5c1f42c31ee1d44dcf6709
	src/third_party/googletest at https://github.com/google/googletest@054a986a8513149e8374fc669a5fe40117ca6b41
	src/third_party/imgui at https://github.com/ocornut/imgui.git@29d462ebce0275345a6ce4621d8fff0ded57c9e5
	src/third_party/json at https://github.com/nlohmann/json.git@17d9eacd248f58b73f4d1be518ef649fe2295642
	src/third_party/ocmock at https://github.com/erikdoe/ocmock.git@c4ec0e3a7a9f56cfdbd0aa01f4f97bb4b75c5ef8
	src/third_party/pkg/archive at https://github.com/brendan-duncan/archive.git@9de7a0544457c6aba755ccb65abb41b0dc1db70d
	src/third_party/pkg/equatable at https://github.com/felangel/equatable.git@0ba67c72db8bed75877fc1caafa74112ee0bd921
	src/third_party/pkg/flutter_packages at https://github.com/flutter/packages.git@26990a2f75ab2028c3c77ffc869db11d6d866d18
	src/third_party/pkg/gcloud at https://github.com/dart-lang/gcloud.git@a5276b85c4714378e84b1fb478b8feeeb686ac26
	src/third_party/pkg/googleapis at https://github.com/google/googleapis.dart.git@07f01b7aa6985e4cafd0fd4b98724841bc9e85a1
	src/third_party/pkg/platform at https://github.com/google/platform.dart.git@1ffad63428bbd1b3ecaa15926bacfb724023648c
	src/third_party/pkg/process at https://github.com/google/process.dart.git@0c9aeac86dcc4e3a6cf760b76fed507107e244d5
	src/third_party/pkg/process_runner at https://github.com/google/process_runner.git@d632ea0bfd814d779fcc53a361ed33eaf3620a0b
	src/third_party/pkg/quiver at https://github.com/google/quiver-dart.git@66f473cca1332496e34a783ba4527b04388fd561
	src/third_party/shaderc at https://github.com/google/shaderc.git@948660cccfbbc303d2590c7f44a4cee40b66fdd6
	src/third_party/tinygltf at https://github.com/syoyo/tinygltf.git@9bb5806df4055ac973b970ba5b3e27ce27d98148
	src/third_party/yapf at https://github.com/google/yapf@212c5b5ad8e172d2d914ae454c121c89cccbcb35

[Hixie]

Today's violations:

There are deps from not allowed hosts in file DEPS
        src at https://github.com/flutter/buildroot.git@a067408d923ccf80742571bb7a71705499f5779e
        src/third_party/benchmark at https://github.com/google/benchmark@431abd149fd76a072f821913c0340137cc755f36
        src/third_party/boringssl at https://github.com/dart-lang/boringssl_gen.git@a468ba9fec3f59edf46a7db98caaca893e1e4d96
        src/third_party/flatbuffers at https://github.com/google/flatbuffers.git@0a80646371179f8a7a5c1f42c31ee1d44dcf6709
        src/third_party/googletest at https://github.com/google/googletest@054a986a8513149e8374fc669a5fe40117ca6b41
        src/third_party/imgui at https://github.com/ocornut/imgui.git@3ea0fad204e994d669f79ed29dcaf61cd5cb571d
        src/third_party/impeller-cmake-example at https://github.com/bdero/impeller-cmake-example.git@270e648f8c00aa900d2d16ef8a347938652d17fb
        src/third_party/json at https://github.com/nlohmann/json.git@17d9eacd248f58b73f4d1be518ef649fe2295642
        src/third_party/ocmock at https://github.com/erikdoe/ocmock.git@c4ec0e3a7a9f56cfdbd0aa01f4f97bb4b75c5ef8
        src/third_party/pkg/archive at https://github.com/brendan-duncan/archive.git@9de7a0544457c6aba755ccb65abb41b0dc1db70d
        src/third_party/pkg/equatable at https://github.com/felangel/equatable.git@0ba67c72db8bed75877fc1caafa74112ee0bd921
        src/third_party/pkg/flutter_packages at https://github.com/flutter/packages.git@25454e63851fe7933f04d025606e68c1eac4fe0f
        src/third_party/pkg/gcloud at https://github.com/dart-lang/gcloud.git@a5276b85c4714378e84b1fb478b8feeeb686ac26
        src/third_party/pkg/googleapis at https://github.com/google/googleapis.dart.git@526011f56d98eab183cc6075ee1392e8303e43e2
        src/third_party/pkg/platform at https://github.com/google/platform.dart.git@1ffad63428bbd1b3ecaa15926bacfb724023648c
        src/third_party/pkg/process at https://github.com/google/process.dart.git@0c9aeac86dcc4e3a6cf760b76fed507107e244d5
        src/third_party/pkg/process_runner at https://github.com/google/process_runner.git@f24c69efdcaf109168f23d381fa281453d2bc9b1
        src/third_party/pkg/quiver at https://github.com/google/quiver-dart.git@90b92bee895e507d435012356a8b5c5f17eafa52
        src/third_party/shaderc at https://github.com/google/shaderc.git@7ea834ecc59258a5c13c3d3e6fa0582bdde7c543
        src/third_party/tinygltf at https://github.com/syoyo/tinygltf.git@9bb5806df4055ac973b970ba5b3e27ce27d98148
        src/third_party/yapf at https://github.com/google/yapf@212c5b5ad8e172d2d914ae454c121c89cccbcb35
allowed_hosts: chrome-infra-packages.appspot.com, fuchsia.googlesource.com, skia.googlesource.com, chromium.googlesource.com, dart.googlesource.com, swiftshader.googlesource.com, boringssl.googlesource.com, llvm.googlesource.com, flutter.googlesource.com

[jmagman]

cc @sealesj working on mirrors and allowed_hosts.