Add missing //go:build integration tag to verify_integration_test.go

The four tests in this file (TestVerifyIntegration,
TestVerifyIntegrationCustomIssuer, TestVerifyIntegrationReusableWorkflow,
TestVerifyIntegrationReusableWorkflowSignerWorkflow) call
NewLiveSigstoreVerifier which requires network access to Sigstore and
GitHub TUF servers. Unlike the other integration test files in this
package (attestation_integration_test.go, sigstore_integration_test.go,
inspect_integration_test.go), this file was missing the //go:build
integration tag, causing these tests to run during a regular
'go test ./...' and fail in network-isolated build environments.

Author: pdostal

pkg/cmd/attestation/verify/verify_integration_test.go

@@ -1,3 +1,5 @@
+//go:build integration
+
 package verify
 
 import (