net/http: TestRequestLimit/h2 becomes significantly more expensive and slower after x/net@v0.23.0 [1.21 backport]

[gopherbot]

@neild requested issue #66668 to be considered for backport to the next 1.21 minor release.

@gopherbot please open backport issues. This is a bug/deficiency in a previous cherrypick, so we should backport the fix as well.

[cagedmantis]

Approved as this is a serious performance regression that was introduced by a fix.

[gopherbot]

Change https://go.dev/cl/578336 mentions this issue: [internal-branch.go1.21-vendor] http2: send correct LastStreamID in stream-caused GOAWAY

[gopherbot]

Change https://go.dev/cl/578335 mentions this issue: [internal-branch.go1.21-vendor] http2: fix TestServerContinuationFlood flakes

[gopherbot]

Change https://go.dev/cl/578357 mentions this issue: [release-branch.go1.21] net/http: update bundled golang.org/x/net/http2

[gopherbot]

Closed by merging 891ac91 to release-branch.go1.21.