[COMPLIANCE] Add Copyright and License Headers (#2137)

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

ui/admin/app/components/form/field/list-wrapper/select/index.hbs

@@ -1,3 +1,8 @@
+{{!
+  Copyright (c) HashiCorp, Inc.
+  SPDX-License-Identifier: MPL-2.0
+}}
+
 <Hds::Table class='list-wrapper-field' name={{@name}}>
 
   <:body as |B|>

ui/admin/app/components/form/field/list-wrapper/select/index.js

@@ -1,3 +1,8 @@
+/**
+ * Copyright (c) HashiCorp, Inc.
+ * SPDX-License-Identifier: MPL-2.0
+ */
+
 import Component from '@glimmer/component';
 import { tracked } from '@glimmer/tracking';
 import { action } from '@ember/object';