IBM Copywrite Statement generation.

[mohanmanikanta2299]

:hammer_and_wrench: Description

1. Made changes to the headers and license commands to accommodate/add new IBM Copyright Statement instead of Hashicorp statement.
2. Added a new update feature to update existing copyright headers from Hashicorp Statement to IBM statement.

:link: External Links

https://hashicorp.atlassian.net/browse/IND-5575

:+1: Definition of Done

• [ ] New functionality works? ✅
• [ ] Tests added?

:thinking: Can be merged upon approval?

:white_check_mark:

PCI review checklist

• [ ] I have documented a clear reason for, and description of, the change I am making.

• [ ] If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.

• [ ] If applicable, I've documented the impact of any changes to security controls.

  Examples of changes to security controls include using new access control methods, adding or removing logging pipelines, etc.