fix(module:image): wrong next/prev btn in rtl mode

[ParsaArvanehPA]

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
[ ] Other... Please describe:

What is the current behavior?

In RTL mode, the display of next and prev buttons are not correct.

What is the new behavior?

Fixed.

Does this PR introduce a breaking change?

[ ] Yes
[✔] No

Other information

I didn't create a rtl.less file to fix this issue because this is also a bug in Ant's version 4 Image component; and since this is our fix and not Ant's, I put the style codes in patch.less file.

[zorro-bot]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 91.60%. Comparing base (297dbec) to head (053fd32).
Report is 7 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #8468      +/-   ##
==========================================
- Coverage   91.62%   91.60%   -0.02%     
==========================================
  Files         530      531       +1     
  Lines       18391    18398       +7     
  Branches     2813     2813              
==========================================
+ Hits        16850    16853       +3     
- Misses       1225     1228       +3     
- Partials      316      317       +1     

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[Nicoss54]

LGTM