Update copyright headers (#3161)

* chore: 🤖 remove hashi copyright .github headers and update config

* chore: 🤖 remove remaining hashicorp copyright headers

* Add missing copyright headers

ui/admin/tests/integration/components/session-recording/player/asciinema-player-test.js

@@ -1,6 +1,6 @@
 /**
- * Copyright (c) HashiCorp, Inc.
- * SPDX-License-Identifier: MPL-2.0
+ * Copyright IBM Corp. 2021, 2026
+ * SPDX-License-Identifier: BUSL-1.1
  */
 
 import { module, test } from 'qunit';