docker: upgrade google.golang.org/grpc to v1.83.1 to fix CVE-2026-84304
Upgrade google.golang.org/grpc dependency to v1.83.1 and re-vendor Go dependencies via `go mod vendor` to resolve CVE-2026-84304 in app-containers/docker.
Provenance:
- CVE-2026-84304: Go module google.golang.org/grpc fixed in v1.83.1, fix commits 7354d9c8debb ("transport: restrict memory overhead of buffering small data frames (#9331)"), 8cfeca0e1ee5 ("Cherry-pick #9331 to v1.83.x (#9333)") (https://github.com/advisories/GHSA-vp52-pcj8-j9qc)
Build adjustments:
- go get google.golang.org/grpc@v1.83.1
- vendor/github.com/moby/buildkit/util/resolver/authorizer.go (ExpiresIn -> ExpiresInSeconds for containerd v1.7.28+)
- go mod tidy && go mod vendor && go mod verify
BUG=b/581561217
TEST=go mod verify; CGO_ENABLED=0 go build -mod=vendor ./...
RELEASE_NOTE=Fixed CVE-2026-84304 in docker.
cos-patch: security-high
Change-Id: Ib1bd73fbb3152f65845a5f15f8af25c70117ead4
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