fix(module:table & i18n): fix table style & export i18n interface

[vthinkxie]

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
close #1160 close #1154

What is the new behavior?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[codecov]

Codecov Report

Merging #1163 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master    #1163      +/-   ##
==========================================
+ Coverage   96.76%   96.76%   +<.01%     
==========================================
  Files         184      184              
  Lines        7571     7581      +10     
  Branches      989      989              
==========================================
+ Hits         7326     7336      +10     
  Misses         55       55              
  Partials      190      190

Impacted Files	Coverage Δ
components/table/nz-th.component.ts	99.09% <100%> (+0.01%)	⬆️
components/table/nz-table.component.ts	95.48% <100%> (+0.24%)	⬆️

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