Get oak_attestation_verification building for no_std

There was a hitch with the bazel/test_workspace. Now that the
diff-checker is enabled, the lockfiles there trigger warnings. To get
around this, I've removed them from CI completely, and just create them
before running the test.

Bug: b/372188809

Change-Id: I9e5b2f4119f3aa4fdb78a0caeccb1fca0566801c

.gitignore

@@ -8,11 +8,11 @@ bazel-*
 # Local additional settings and overrides.
 /.local.bazelrc
 
-# These exist as empty files, but we don't want to check in any changes to them.
-bazel/test_workspace/Cargo-test.bazel.lock
-bazel/test_workspace/Cargo_no_std-test.bazel.lock
-bazel/test_workspace/cargo-bazel-test-lock.json
-bazel/test_workspace/cargo-no-std-test-bazel-lock.json
+# We don't want to force test_workspace repinning to be part of normal workflow.
+# If you want to experiment in the test directory, run the boostrap script
+# there first.
+bazel/test_workspace/Cargo*.lock
+bazel/test_workspace/cargo*.json
 
 # Index file used to compare artifacts for reproducibility.
 /reproducibility_index