fix(module:code-editor): always initialize outside of the Angular zone

[arturovt]

PR Checklist

• 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

[x] Bugfix

[codecov]

Codecov Report

Merging #7151 (391983e) into master (c177558) will decrease coverage by 0.03%.
The diff coverage is 14.28%.

@@            Coverage Diff             @@
##           master    #7151      +/-   ##
==========================================
- Coverage   91.67%   91.63%   -0.04%     
==========================================
  Files         486      486              
  Lines       15868    15872       +4     
  Branches     2587     2588       +1     
==========================================
- Hits        14547    14545       -2     
- Misses       1007     1012       +5     
- Partials      314      315       +1     

Impacted Files	Coverage Δ
components/code-editor/code-editor.component.ts	16.00% <14.28%> (+0.29%)	⬆️
components/core/util/text-measure.ts	92.10% <0.00%> (-0.88%)	⬇️
components/tabs/tab-nav-bar.component.ts	87.23% <0.00%> (-0.71%)	⬇️

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[wzhudev]

LGTM. Thanks!