cmd/compile: compute type eq/hash algorithm in CalcSize instead of on demand
For #65540
Actually more correct in some very weird, and probably impossible to
trigger currently, cases. For instance, a struct with a NOEQ
and a NOALG field (the old code would not report the noalg bit).
Change-Id: I36c473b59aa5775d8a520ac746b114d16a22699d
Reviewed-on: https://go-review.googlesource.com/c/go/+/571542 Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>