[release-branch.go1.24] crypto/internal/fips140/ecdsa: make TestingOnlyNewDRBG generic

[release-branch.go1.24] crypto/internal/fips140/ecdsa: make TestingOnlyNewDRBG generic

We are re-sealing the .zip file anyway for another reason, might as well
take the opportunity to remove the fips140.Hash type indirection.

Updates #75523

Change-Id: I6a6a6964fdb312cc2c64e327f845c398c0f6279b
Reviewed-on: https://go-review.googlesource.com/c/go/+/701442
Reviewed-by: Roland Shoemaker <roland@golang.org>
Commit-Queue: Junyang Shao <shaojunyang@google.com>
Reviewed-by: Junyang Shao <shaojunyang@google.com>
TryBot-Bypass: Filippo Valsorda <filippo@golang.org>