[COMPLIANCE] Add Copyright and License Headers (#1163)

Co-authored-by: hashicorp-copywrite[bot] <110428419+hashicorp-copywrite[bot]@users.noreply.github.com>

Author: hashicorp-copywrite[bot]

Diff for: .github/ISSUE_TEMPLATE/config.yml

@@ -1,3 +1,6 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
 blank_issues_enabled: false
 contact_links:
   - name: Provider-related Feedback and Questions

Diff for: .github/gobenchdata-checks.yml

@@ -1,3 +1,6 @@
+# Copyright (c) HashiCorp, Inc.
+# SPDX-License-Identifier: MPL-2.0
+
 checks:
   - package: ./internal/langserver/handlers
     name: local-single-module-no-provider