feat(module:breadcrumb): add nzRouteLabelFn property

[YuchenWell]

close #5523

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: #5523

What is the new behavior?

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 #5545 into master will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #5545      +/-   ##
==========================================
+ Coverage   91.19%   91.22%   +0.02%     
==========================================
  Files         454      454              
  Lines       13952    13953       +1     
  Branches     2219     2219              
==========================================
+ Hits        12724    12728       +4     
+ Misses        724      719       -5     
- Partials      504      506       +2     

Impacted Files	Coverage Δ
components/breadcrumb/breadcrumb.component.ts	100.00% <100.00%> (ø)
components/table/src/table-style.service.ts	94.82% <0.00%> (-1.73%)	⬇️
components/time-picker/time-holder.ts	94.73% <0.00%> (-1.06%)	⬇️
components/table/src/table/tr-measure.component.ts	100.00% <0.00%> (+13.04%)	⬆️
components/table/src/table/tbody.component.ts	100.00% <0.00%> (+14.28%)	⬆️

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[wzhudev]

LGTM. Thanks!