net/http: TestWrappedResponseController failures

[gopherbot]

#!watchflakes
post <- pkg == "net/http" && test == "TestWrappedResponseController"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestWrappedResponseController (0.00s)
    --- FAIL: TestWrappedResponseController/h1 (0.01s)
        responsecontroller_test.go:249: ctl.Flush() = http2: stream closed, want nil

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "net/http" && test == "TestWrappedResponseController"

2022-11-24 04:12 dragonfly-amd64-622 go@2c7c98c3 net/http.TestWrappedResponseController (log)

--- FAIL: TestWrappedResponseController (0.00s)
    --- FAIL: TestWrappedResponseController/h1 (0.01s)
        responsecontroller_test.go:249: ctl.Flush() = http2: stream closed, want nil

— watchflakes

[bcmills]

attn @neild; this test was unskipped in HTTP/2 mode very recently in https://go.dev/cl/449935.

[bcmills]

This test is new as of Go 1.20 (for #54136).

Marking as release-blocker at least until we can determine whether this failure mode affects first-class ports.

[gopherbot]

Change https://go.dev/cl/453860 mentions this issue: net/http: deflake and fix TestWrappedResponseController

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
post <- pkg == "net/http" && test == "TestWrappedResponseController"

2023-02-01 19:47 linux-amd64-race go@ab0f0459 net/http.TestWrappedResponseController (log)

--- FAIL: TestWrappedResponseController (0.00s)

2023-02-01 21:30 darwin-amd64-race go@4b7f7eef net/http.TestWrappedResponseController (log)

--- FAIL: TestWrappedResponseController (0.00s)

— watchflakes

[bcmills]

The above are #58168.