x/build: add longtest builders for all first class ports

[FiloSottile]

We currently have no longtest builders for arm64 or arm. Although I know getting compute on non-amd64 architectures is harder, and longtests on arm might take forever, there's a lot of stuff that is skipped on -short. For example, ECDSA is only tested with one curve on -short. This does catch most mistakes, but it also fails to test a lot of architecture-specific code in other curve implementations. Ideally, a longtest builder would be a requirement for first class ports.

(Apologies if there's already an issue open for this, searching long tests didn't bring up anything.)

/cc @golang/release

[bcmills]

We currently have no longtest builders for arm64 or arm.

That's #49649.

(See also #35678 and #49055 for darwin/amd64 and darwin/arm64.)

[FiloSottile]

Aha! Figured it'd be a duplicate. It's the original's birthday, too!

[FiloSottile]

Feel free to close or keep it as an umbrella issue if it feels useful!

[joedian]

Duplicate