fix(abc:st): correct width misalignment in export excel

[cipchk]

• close st导出貌似没有正确处理已被忽略的列 ng-alain#2423

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ng-alain/delon/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?

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[ng-alain-bot]

Preview is ready!

[codecov]

Codecov Report

Merging #1655 (abafddf) into master (7a21933) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

❗ Current head abafddf differs from pull request most recent head e52c449. Consider uploading reports for the commit e52c449 to get more accurate results

@@            Coverage Diff             @@
##           master    #1655      +/-   ##
==========================================
- Coverage   95.57%   95.57%   -0.01%     
==========================================
  Files         281      281              
  Lines        8741     8738       -3     
  Branches     1732     1732              
==========================================
- Hits         8354     8351       -3     
  Misses        319      319              
  Partials       68       68              

Files Changed	Coverage Δ
packages/abc/st/st-export.ts	100.00% <100.00%> (ø)