fix(ci): add license header

[ronething]

Signed-off-by: ashing axingfly@gmail.com

Type of change:

• Bugfix
• New feature provided
• Improve performance
• Backport patches
• Documentation
• Refactor
• Chore
• CI/CD or Tests

What this PR does / why we need it:

Pre-submission checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

[Copilot]

Pull Request Overview

Add the Apache Software Foundation license header to all code, test, script, documentation, example, and manifest files to ensure consistent licensing across the repository.

• Insert ASF license header at the top of Go, YAML, shell, template, example, and Makefile files.
• Remove outdated license comments and replace them with the standardized ASF header.
• Update CI scripts and Makefile to use license verification tooling.

Reviewed Changes

Copilot reviewed 146 out of 148 changed files in this pull request and generated 1 comment.

Show a summary per file

File/Pattern	Description
test/e2e/**.go, test/e2e/**.yaml	Added ASF license header to all E2E tests and scaffolding manifests.
test/conformance/**.go	Added ASF license header to conformance tests.
scripts/**.sh, scripts/**.go	Added ASF license to tooling scripts.
pkg/utils/**.go, pkg/id/**.go, internal/**.go	Added ASF license header to all Go packages.
examples/**/*.yaml	Added ASF license header to example manifests.
docs/template/**.tpl, docs/crd/config.yaml	Added ASF license header to documentation templates and CRD config.
cmd/**.go, api/**.go	Added ASF license header to main commands and API definitions.
Makefile	Added ASF license header and updated license-related targets.