Remove gotip modififications once go1.26 is available

[gdams]

Once go1.26 has been released we should remove all the gotip modifications from the GitHub actions CI that were introduced in #80

Start by removing https://github.com/microsoft/go-crypto-darwin/tree/main/.github/actions/gotip and then revert the changes made to .github/actions/gotip/action.yml

Full list of CLs that are included in the gotip build that need to be merged upstream:

• 703315: cmd/link/internal/arm64: support Mach-O ARM64_RELOC_POINTER_TO_GOT in internal linking | https://go-review.googlesource.com/c/go/+/703315
• 703316: cmd/link/internal/arm64: support Mach-O ARM64_RELOC_SUBTRACTOR in internal linking | https://go-review.googlesource.com/c/go/+/703316
• 703776: cmd/link: fix Macho-O X86_64_RELOC_SUBTRACTOR in internal linking | https://go-review.googlesource.com/c/go/+/703776
• 708575: syscall: use rawSyscall6 to call ptrace in forkAndExecInChild | https://go-review.googlesource.com/c/go/+/708575
• 699177: runtime,syscall: implement and use syscallN on darwin | https://go-review.googlesource.com/c/go/+/699177
• 703335: syscalln static lib integration | https://go-review.googlesource.com/c/go/+/703335
• 700856: runtime: ignore race atomic call when running without P | https://go-review.googlesource.com/c/go/+/700856

[gdams]

@qmuntal what's the impact of the abondoned CLs? Will we need to float these patches in our backend?

[qmuntal]

I abandoned because they are no longer required, and also updated the still-active CLs. I had to change some bits after getting reviews from Google. Overall I'm happier with the current CLs.

[gdams]

All patches have now been merged into master. Now we just need to wait until go.126 is released to remove the gotip modifications.