feat(module:select): select on Tab support

[dev-anton-ko]

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

What is the current behavior?

Issue Number: #7622

What is the new behavior?

If nzSelectOnTab is true - selection of an item might be performed by TAB key

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[zorro-bot]

This preview will be available after the AzureCI is passed.

[codecov]

Codecov Report

Merging #7728 (de90b09) into master (f6a8044) will increase coverage by 0.04%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #7728      +/-   ##
==========================================
+ Coverage   92.03%   92.07%   +0.04%     
==========================================
  Files         502      502              
  Lines       16763    16774      +11     
  Branches     2638     2641       +3     
==========================================
+ Hits        15427    15445      +18     
+ Misses       1069     1061       -8     
- Partials      267      268       +1     

Impacted Files	Coverage Δ
components/select/select.component.ts	91.46% <100.00%> (+0.16%)	⬆️
components/table/src/table-style.service.ts	94.82% <0.00%> (-1.73%)	⬇️
components/alert/alert.component.ts	95.31% <0.00%> (+0.07%)	⬆️
components/image/image-preview.component.ts	94.30% <0.00%> (+0.11%)	⬆️
components/tabs/tab-nav-bar.component.ts	88.65% <0.00%> (+0.70%)	⬆️
components/table/src/table/tr-measure.component.ts	91.30% <0.00%> (+4.34%)	⬆️
...ts/table/src/table/table-inner-scroll.component.ts	83.82% <0.00%> (+4.41%)	⬆️
components/table/src/table/tbody.component.ts	100.00% <0.00%> (+11.11%)	⬆️

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[simplejason]

LGTM