feat(module:core): support reset NZ_CONFIG inside component & overflow component

[vthinkxie]

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• 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?

Issue Number: N/A

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[zorro-bot]

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[codecov]

Codecov Report

Merging #6601 (b878f51) into master (923f14e) will decrease coverage by 0.12%.
The diff coverage is 56.52%.

@@            Coverage Diff             @@
##           master    #6601      +/-   ##
==========================================
- Coverage   89.70%   89.58%   -0.13%     
==========================================
  Files         486      488       +2     
  Lines       15757    15777      +20     
  Branches     2564     2568       +4     
==========================================
- Hits        14135    14134       -1     
- Misses        980     1002      +22     
+ Partials      642      641       -1     

Impacted Files	Coverage Δ
...nts/cdk/resize-observer/resize-observer.service.ts	73.68% <ø> (ø)
components/date-picker/date-picker.component.ts	90.97% <ø> (ø)
components/page-header/page-header.component.ts	85.00% <ø> (ø)
components/table/src/table.module.ts	100.00% <ø> (ø)
components/table/src/table/table.component.ts	90.32% <ø> (ø)
components/table/src/table/tr-measure.component.ts	86.95% <ø> (-13.05%)	⬇️
components/tabs/tab-nav-bar.component.ts	83.03% <ø> (ø)
...s/cdk/resize-observer/resize-observer.directive.ts	28.57% <28.57%> (ø)
components/core/config/config.service.ts	91.17% <62.50%> (-5.89%)	⬇️
components/select/select.component.ts	87.22% <77.77%> (-0.05%)	⬇️
... and 10 more

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[wzhudev]

如果之后用户对父级的 NzConfigService 做出了修改，例如调用 set 方法更新某个 config，这样不会被传递到子级的 NzConfigService 去。

还是说这里就是想要做成这样子呢？

[vthinkxie]

嗯，不会生效，我在文档中再说明一下

[hsuanxyz]

LGTM