fix(module:popconfirm): missing arrow

[chenc041]

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?

[x] 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?

Any default nz-popconfirm will not show the 'arrow' even though it is marked as the default action.

Issue Number: #7064

What is the new behavior?

When using nz-popconfirm it used to have the little 'arrow' on the edge of the popconfirm dialog box;

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 #7086 (58b10ef) into master (4f868e4) will decrease coverage by 0.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #7086      +/-   ##
==========================================
- Coverage   89.92%   89.60%   -0.33%     
==========================================
  Files         481      488       +7     
  Lines       15380    15873     +493     
  Branches     2344     2584     +240     
==========================================
+ Hits        13831    14223     +392     
- Misses        929     1017      +88     
- Partials      620      633      +13     

Impacted Files	Coverage Δ
components/popconfirm/popconfirm.ts	96.15% <ø> (-3.85%)	⬇️
.../table/src/table/table-virtual-scroll.directive.ts	25.00% <0.00%> (-25.00%)	⬇️
components/core/overlay/nz-connected-overlay.ts	85.71% <0.00%> (-14.29%)	⬇️
components/table/src/table/tr-measure.component.ts	86.95% <0.00%> (-13.05%)	⬇️
components/table/src/table/tbody.component.ts	88.88% <0.00%> (-11.12%)	⬇️
components/core/services/resize.ts	85.71% <0.00%> (-6.60%)	⬇️
components/core/config/config.service.ts	91.17% <0.00%> (-5.89%)	⬇️
components/steps/steps.component.ts	91.13% <0.00%> (-5.74%)	⬇️
components/core/tree/nz-tree-base-util.ts	84.37% <0.00%> (-5.63%)	⬇️
...ts/table/src/table/table-inner-scroll.component.ts	77.14% <0.00%> (-4.29%)	⬇️
... and 352 more

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[wzhudev]

Hi. Thanks for this PR. Could you please make the CI pass?

[chenc041]

Hi. Thanks for this PR. Could you please make the CI pass?

ok, wait ~

[chenc041]

Hi. Thanks for this PR. Could you please make the CI pass?

pass~

[wzhudev]

LGTM