runtime: TestCgoCallbackGC failures

[gopherbot]

#!watchflakes
default <- pkg == "runtime" && test == "TestCgoCallbackGC"

Issue created automatically to collect these failures.

Example (log):

--- FAIL: TestCgoCallbackGC (0.00s)
    crash_cgo_test.go:72: /data/golang/workdir/tmp/go-build4029398001/testprogcgo.exe CgoCallbackGC failed to start: context deadline exceeded

— watchflakes

[gopherbot]

Found new dashboard test flakes for:

#!watchflakes
default <- pkg == "runtime" && test == "TestCgoCallbackGC"

2023-05-24 03:36 linux-s390x-ibm go@f0d575c2 runtime.TestCgoCallbackGC (log)

--- FAIL: TestCgoCallbackGC (0.00s)
    crash_cgo_test.go:72: /data/golang/workdir/tmp/go-build4029398001/testprogcgo.exe CgoCallbackGC failed to start: context deadline exceeded

— watchflakes

[bcmills]

Duplicate of #61265