chore: update tsconfig for better vscode integration

[wzhudev]

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
[x] Other... Please describe: Improve coding experience with vscode by modifying .tsconfig files

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

vscode cannot handle multiple .tsconfig files in the same directory. See microsoft/TypeScript#8435 and microsoft/vscode#12463. This PR could improve developing experience for contributors who use vscode.

Typically in spec files:

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[codecov]

Codecov Report

Merging #3949 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #3949   +/-   ##
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  Coverage   95.29%   95.29%           
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  Files         777      777           
  Lines       14825    14825           
  Branches     1911     1911           
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  Hits        14127    14127           
  Misses        260      260           
  Partials      438      438

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[vthinkxie]

LGTM