hash/maphash: parallel run test

[qiulaidongfeng]

This reduces the go test hash/maphash time by more than half.

[gopherbot]

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[gopherbot]

Message from Gopher Robot:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from qiulaidongfeng:

Patch Set 1: Commit-Queue+1

(1 comment)

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[gopherbot]

Message from Go LUCI:

Patch Set 1:

Dry run: CV is trying the patch.

Bot data: {"action":"start","triggered_at":"2024-02-16T01:53:32Z","revision":"7f3ae7036b2863bfea0a149abc600c4099c644d9"}

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[gopherbot]

Message from qiulaidongfeng:

Patch Set 1: -Commit-Queue

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[gopherbot]

Message from Go LUCI:

Patch Set 1:

This CL has passed the run

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[gopherbot]

Message from Go LUCI:

Patch Set 1: LUCI-TryBot-Result+1

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[gopherbot]

Message from Keith Randall:

Patch Set 1: Auto-Submit+1 Code-Review+2

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[gopherbot]

Message from Keith Randall:

Patch Set 1: Code-Review+1

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[gopherbot]

Message from Keith Randall:

Patch Set 1:

(1 comment)

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[gopherbot]

Message from qiulaidongfeng:

Patch Set 1:

(1 comment)

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[gopherbot]

This PR is being closed because golang.org/cl/564576 has been merged.