hash/maphash: hashing channels with purego impl. of maphash.Comparable panics [1.24 backport]

[gopherbot]

@qiulaidongfeng requested issue #73657 to be considered for backport to the next 1.24 minor release.

@gopherbot please consider this for backport to 1.24. This issue causes when using pruego build tags, maphash.Comparable cannot handle channal type correctly. There is no solution.

[qiulaidongfeng]

@seankhliao can you cherry-pick CL 671655 to release-branch.go1.24?

See https://go.dev/wiki/MinorReleases#making-cherry-pick-cls, I don`t is original CL or approvers, so I don`t can do.

[gopherbot]

Change https://go.dev/cl/676817 mentions this issue: [release-branch.go1.24] hash/maphash: hash channels in purego version of maphash.Comparable

[gopherbot]

Closed by merging CL 676817 (commit db8f1dc) to release-branch.go1.24.