cmd/compile: Unified IR exports table is binary unstable in presence of generics [1.20 backport] #59585
Description
@mdempsky requested issue #59571 to be considered for backport to the next 1.20 minor release.
@rsc Agreed. I've narrowed down the cause; just figuring out the best way to fix it.
@gopherbot Please backport to Go 1.20.