crypto/internal/fips: import crypto/internal/fips/check throughout

crypto/internal/fips: import crypto/internal/fips/check throughout

The module must do the integrity self-check before any other operation
in FIPS mode.

For #69536

Change-Id: I8db52ea94e867812008a6e7a86ca2c648a0018c6
Reviewed-on: https://go-review.googlesource.com/c/go/+/629056
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Filippo Valsorda <filippo@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>