perf(module:rate): do not run change detection on focus and blur events if there are no output listeners

[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] Refactoring (no functional changes, no api changes)

Does this PR introduce a breaking change?

[ ] Yes
[x] No

[codecov]

Codecov Report

Merging #7182 (91e2bca) into master (77db914) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #7182      +/-   ##
==========================================
- Coverage   91.67%   91.67%   -0.01%     
==========================================
  Files         486      486              
  Lines       15868    15871       +3     
  Branches     2587     2588       +1     
==========================================
+ Hits        14547    14549       +2     
- Misses       1007     1008       +1     
  Partials      314      314              

Impacted Files	Coverage Δ
components/rate/rate.component.ts	96.89% <100.00%> (+0.07%)	⬆️
components/core/util/text-measure.ts	92.10% <0.00%> (-0.88%)	⬇️

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[wzhudev]

LGTM