feat(module:modal): add afterOpen/afterClose/afterAllClose/closeAll/openModals, adjust the boolean props and changeBodyOverflow and complete testing.

[wilsoncook]

…capabilities

close #1155

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
[ ] Documentation content changes
[ ] Application (the showcase website) / infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: #1155

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[codecov]

Codecov Report

Merging #1165 into master will increase coverage by 0.02%.
The diff coverage is 98.61%.

@@            Coverage Diff             @@
##           master    #1165      +/-   ##
==========================================
+ Coverage   96.75%   96.78%   +0.02%     
==========================================
  Files         184      185       +1     
  Lines        7586     7653      +67     
  Branches      991     1001      +10     
==========================================
+ Hits         7340     7407      +67     
  Misses         56       56              
  Partials      190      190

Impacted Files	Coverage Δ
components/modal/nz-modal.module.ts	100% <100%> (ø)	⬆️
components/modal/nz-modal-ref.class.ts	100% <100%> (ø)
components/modal/nz-modal-control.service.ts	100% <100%> (ø)
components/modal/nz-modal.service.ts	91.17% <96.15%> (+1.52%)	⬆️
components/modal/nz-modal.component.ts	96.46% <98.8%> (+0.51%)	⬆️

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