hash/maphash: test timeouts on longtest -race builder

[thanm]

What version of Go are you using (go version)?

$ go version
go version devel go1.20-79e3fd1d39 Fri Nov 18 09:01:24 2022 -0500 linux/amd64

Does this issue reproduce with the latest release?

yes

What operating system and processor architecture are you using (go env)?

linux/amd64

What did you do?

Looked at the 1.18 release builder dashboard.

What did you expect to see?

clean longtest -race test result

What did you see instead?

There are a series of failures example in the hash/maphash test when run in -race mode; these tests are timing out at about 15 mins or so.

Probably doesn't make sense to run the exhaustive "torture" test for this package in -race mode, I am going to send a CL to tone down or disable the tests in this case in consultation with Keith.

[gopherbot]

Change https://go.dev/cl/454455 mentions this issue: hash/maphash: eliminate torture test for -race