cmd/dist: skip FIPS 140-3 testing

cmd/dist: skip FIPS 140-3 testing

This will be re-enabled by an in-progress CR. For now, ignore this test
process to prevent build breakage.

Change-Id: Ica1cb1c4f9844164ab32767ce2a499021d40b997
Reviewed-on: https://go-review.googlesource.com/c/go/+/630237
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
Auto-Submit: Filippo Valsorda <filippo@golang.org>