fix(module:image): image fit content when drag released

[stygian-desolator]

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?

image will fit content when drag released

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 #6262 (820c5c7) into master (6b056b9) will increase coverage by 0.04%.
The diff coverage is 85.71%.

@@            Coverage Diff             @@
##           master    #6262      +/-   ##
==========================================
+ Coverage   89.79%   89.84%   +0.04%     
==========================================
  Files         477      478       +1     
  Lines       15186    15227      +41     
  Branches     2298     2311      +13     
==========================================
+ Hits        13636    13680      +44     
+ Misses        951      943       -8     
- Partials      599      604       +5     

Impacted Files	Coverage Δ
components/image/image-preview.component.ts	90.13% <76.92%> (+2.27%)	⬆️
components/image/utils.ts	89.65% <89.65%> (ø)
components/tabs/tab-nav-bar.component.ts	83.09% <0.00%> (+1.40%)	⬆️

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[stygian-desolator]

@hsuanxyz cc, thanks~

[stygian-desolator]

wait

[stygian-desolator]

@hsuanxyz cc, thanks~

[stygian-desolator]

Please review again, thanks~
But I'm a little confused, why corecov/patch failed 🤔

[hsuanxyz]

LGTM, The codecov's baseline may be broken, you don't have to worry, it doesn't stop us from merge it .