chore: bump eslint to 9.18.0

[Laffery]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/NG-ZORRO/ng-zorro-antd/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Application (the showcase website) / infrastructure changes
• Other... Please describe: eslint

What is the current behavior?

Issue Number: N/A

What is the new behavior?

• bump eslint to ^9.18.0 and use flat config
• lots of spec file changes due to adding licence header

Does this PR introduce a breaking change?

• Yes
• No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Attention: Patch coverage is 90.38462% with 10 lines in your changes missing coverage. Please review.

Project coverage is 91.94%. Comparing base (bd109e7) to head (65e49f8).

Files with missing lines	Patch %	Lines
components/qr-code/qrcodegen.ts	76.47%	3 Missing and 1 partial ⚠️
...ponents/date-picker/lib/decade-header.component.ts	0.00%	3 Missing ⚠️
...mponents/date-picker/lib/decade-table.component.ts	33.33%	2 Missing ⚠️
components/core/polyfill/request-animation.ts	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8994      +/-   ##
==========================================
+ Coverage   91.92%   91.94%   +0.01%     
==========================================
  Files         555      555              
  Lines       19712    19708       -4     
  Branches     2946     2946              
==========================================
- Hits        18121    18120       -1     
+ Misses       1264     1262       -2     
+ Partials      327      326       -1     

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