crypto/tls: TestVerifyConnection/TLSv12 failures [1.23 backport]

[gopherbot]

@FiloSottile requested issue #71077 to be considered for backport to the next 1.23 minor release.

@gopherbot please open backport issues for CL 639655. Tests are broken across releases.

[dmitshur]

I tried creating backports, but there are some merge conflicts. @FiloSottile If you don't mind and have a chance, perhaps it's easier for you to resolve them and send the CLs for review. Thanks.

(We haven't reviewed this backport yet, but it's clear we'll need to either skip or fix the tests.)

[FiloSottile]

The Go 1.23 backport is hitting a difference in behavior that I can't yet explain, I'll try to figure it out tomorrow.

[gopherbot]

Change https://go.dev/cl/640315 mentions this issue: [release-branch.go1.23] crypto/tls: fix Config.Time in tests using expired certificates

[gopherbot]

Closed by merging CL 640315 (commit 3417000) to release-branch.go1.23.