feat(module:tag): borderless mode

[ParsaArvanehPA]

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:

What is the current behavior?

Ant design provides a borderless mode for its tag component, which is not available in ng-zorro.

What is the new behavior?

Implemented borderless mode for tag component.

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

All modified and coverable lines are covered by tests ✅

Comparison is base (8c0dd00) 91.72% compared to head (b3e401b) 91.73%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8320      +/-   ##
==========================================
+ Coverage   91.72%   91.73%   +0.01%     
==========================================
  Files         520      520              
  Lines       18010    18011       +1     
  Branches     2838     2838              
==========================================
+ Hits        16519    16522       +3     
+ Misses       1188     1186       -2     
  Partials      303      303              

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[Nicoss54]

make pass the linter

[ParsaArvanehPA]

make pass the linter

Thank you for checking my pr.
Linter problems are now fixed.