[COMPLIANCE] Update Copyright Headers (#6282)

* [COMPLIANCE] Update Copyright and License Headers

* chore: make gen to generate files with copyright headers

* chore: update missed copyright headers

---------

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

internal/api/genapi/input.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2020, 2025
 // SPDX-License-Identifier: BUSL-1.1
 
 package main

internal/api/genapi/main.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2020, 2025
 // SPDX-License-Identifier: BUSL-1.1
 
 package main

internal/api/genapi/parse.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2020, 2025
 // SPDX-License-Identifier: BUSL-1.1
 
 package main

internal/api/genapi/templates.go

@@ -1,4 +1,4 @@
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2020, 2025
 // SPDX-License-Identifier: BUSL-1.1
 
 package main
@@ -796,7 +796,7 @@ var structTemplate = template.Must(template.New("").Funcs(
 	},
 ).Parse(
 	fmt.Sprint(`// Code generated by "make api"; DO NOT EDIT.
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2020, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package {{ .Package }}
@@ -924,7 +924,7 @@ var optionTemplate = template.Must(template.New("").Funcs(
 		"removeDups": removeDups,
 	},
 ).Parse(`// Code generated by "make api"; DO NOT EDIT.
-// Copyright (c) HashiCorp, Inc.
+// Copyright IBM Corp. 2020, 2025
 // SPDX-License-Identifier: MPL-2.0
 
 package {{ .Package }}