feat: screenshot reports with custom width

[betodealmeida]

SUMMARY

Follow up to #24547, use the stored custom_width and custom_heigth when generating report screenshots.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[codecov]

Codecov Report

Merging #24549 (4d76032) into master (be9eb0f) will increase coverage by 13.81%.
The diff coverage is 100.00%.

❗ Current head 4d76032 differs from pull request most recent head 0420093. Consider uploading reports for the commit 0420093 to get more accurate results

@@             Coverage Diff             @@
##           master   #24549       +/-   ##
===========================================
+ Coverage   55.26%   69.08%   +13.81%     
===========================================
  Files        1906     1906               
  Lines       74157    74141       -16     
  Branches     8161     8154        -7     
===========================================
+ Hits        40985    51222    +10237     
+ Misses      31053    20800    -10253     
  Partials     2119     2119               

Flag	Coverage Δ
hive	53.93% <0.00%> (?)
mysql	79.39% <100.00%> (?)
postgres	79.48% <100.00%> (?)
presto	53.83% <0.00%> (?)
python	83.48% <100.00%> (+28.78%)	⬆️
sqlite	78.04% <100.00%> (?)
unit	54.69% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset/reports/commands/execute.py	92.02% <100.00%> (+92.02%)	⬆️

... and 331 files with indirect coverage changes

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