perf(module:back-top): mark scroll listener as passive

[arturovt]

No description provided.

[zorro-bot]

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[codecov]

Codecov Report

Merging #7329 (4b214b5) into master (2d77bc2) will increase coverage by 0.03%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #7329      +/-   ##
==========================================
+ Coverage   91.59%   91.62%   +0.03%     
==========================================
  Files         487      487              
  Lines       16006    16014       +8     
  Branches     2604     2604              
==========================================
+ Hits        14660    14673      +13     
+ Misses       1033     1027       -6     
- Partials      313      314       +1     

Impacted Files	Coverage Δ
components/back-top/back-top.component.ts	91.80% <100.00%> (+0.13%)	⬆️
components/upload/upload.component.ts	92.59% <0.00%> (-1.90%)	⬇️
components/table/src/table-style.service.ts	94.82% <0.00%> (-1.73%)	⬇️
components/tabs/tab-nav-bar.component.ts	87.94% <0.00%> (+0.70%)	⬆️
components/list/list-item-cell.ts	92.00% <0.00%> (+3.53%)	⬆️
components/table/src/table/tr-measure.component.ts	91.30% <0.00%> (+4.34%)	⬆️
...ts/table/src/table/table-inner-scroll.component.ts	83.82% <0.00%> (+4.41%)	⬆️
components/table/src/table/tbody.component.ts	100.00% <0.00%> (+11.11%)	⬆️

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[cipchk]

LGTM