Build: Upgrade to RAT 0.16.1, scanning hidden directories and adding missing ASF headers

[manuzhang]

No description provided.

[kevinjqliu]

Thanks! It's weird that these are missed given that we have the RAT check to run on GitHub Action https://github.com/apache/iceberg-python/blob/main/.github/workflows/license_check.yml

[kevinjqliu]

Ok looks like RAT v0.15 does not scan hidden directories by default. See similar issue apache/datafusion#9851

The Java Iceberg repo has updated the check-license script to use RAT v0.16.1 with the --scan-hidden-directories option (apache/iceberg #9495 and apache/iceberg #9579).

This change should catch the missing ASF headers in the ./github dir

@manuzhang do you mind including this in the current PR?

[kevinjqliu]

Verified locally with RAT 0.16.1. All 4 files missing header addressed in this PR.

ERROR: Ignored 0 lines in your exclusion files as comments or empty lines.
Could not find Apache license headers in the following files:
 !????? /Users/kevinliu/repos/iceberg-python/.github/ISSUE_TEMPLATE/iceberg_bug_report.yml
 !????? /Users/kevinliu/repos/iceberg-python/.github/ISSUE_TEMPLATE/iceberg_improvement.yml
 !????? /Users/kevinliu/repos/iceberg-python/.github/ISSUE_TEMPLATE/iceberg_question.yml
 !????? /Users/kevinliu/repos/iceberg-python/.github/workflows/check-md-link.yml
name: Iceberg Bug report ??
      label: Please describe the bug ??

[kevinjqliu]

thanks for the contribution @manuzhang !