fix(module:input): support reactive form disabled

[nuonuoge]

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?

Issue Number: N/A

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 #5316 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #5316   +/-   ##
=======================================
  Coverage   91.35%   91.36%           
=======================================
  Files         551      551           
  Lines       13908    13914    +6     
  Branches     2099     2101    +2     
=======================================
+ Hits        12706    12712    +6     
  Misses        712      712           
  Partials      490      490           

Impacted Files	Coverage Δ
components/input/input.directive.ts	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e13142c...e7e41f8. Read the comment docs.

[nuonuoge]

#5307

[vthinkxie]

https://stackblitz.com/edit/angular-fumfvw?file=src/app/app.component.ts
any reason to change the code? any related issues?

[nuonuoge]

any reason to change the code? any related issues?
https://stackblitz.com/edit/angular-aveg5n-m7xjmv?file=src/app/app.component.ts

when use form.get('xxx').disable(); it's not work

[vthinkxie]

I think #5307 should be fixed with update the disabled$ inside input directive, the bug is not caused by the attribute of nz-input, but the class of nz-input-group.

[nuonuoge]

https://stackblitz.com/edit/angular-fumfvw?file=src/app/app.component.ts

the @input disabled is not changed, you can see the class does not has 'ant-input-disabled'，only native disabled work

[vthinkxie]

https://stackblitz.com/edit/angular-fumfvw?file=src/app/app.component.ts

the @input disabled is not changed, you can see the class does not has 'ant-input-disabled'，only native disabled work

there are still some fixes needed, I have submitted it here #5428
thanks for your PR anyway