feat(module:pageheader): disable back button if no history

[Nicoss54]

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?

Currently back button in Page Header component is never disabled even if there is no history entry

Issue Number: N/A

What is the new behavior?

Back button is disabled is there is no entry in the history navigation

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 71.42857% with 2 lines in your changes missing coverage. Please review.

Project coverage is 91.95%. Comparing base (2d9ff5f) to head (c7ca89b).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
components/page-header/page-header.component.ts	71.42%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9041      +/-   ##
==========================================
+ Coverage   91.94%   91.95%   +0.01%     
==========================================
  Files         559      559              
  Lines       19769    19773       +4     
  Branches     3050     3050              
==========================================
+ Hits        18176    18182       +6     
+ Misses       1266     1265       -1     
+ Partials      327      326       -1     

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[Nicoss54]

@HyperLife1119 have an issue with build on the pipeline but i can't reproduce in local, could you help or have an idea ?

Nothing change between the two changes I made :/. Change between the two reviews have no impact on the error.

We have this error because the prerendering take two much time! Investigating angular repo Timeout occurs after 30s

[Laffery]

LGTM

[HyperLife1119]

LGTM