ci: disable flaky async test

[villebro]

SUMMARY

Disable a test that frequently fails on the MySQL CI workflow.

SCREENSHOT

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 #23527 (665befc) into master (de42c11) will increase coverage by 0.03%.
The diff coverage is n/a.

❗ Current head 665befc differs from pull request most recent head 1798883. Consider uploading reports for the commit 1798883 to get more accurate results

@@            Coverage Diff             @@
##           master   #23527      +/-   ##
==========================================
+ Coverage   67.64%   67.68%   +0.03%     
==========================================
  Files        1914     1914              
  Lines       73925    73925              
  Branches     8020     8020              
==========================================
+ Hits        50009    50033      +24     
+ Misses      21873    21849      -24     
  Partials     2043     2043              

Flag	Coverage Δ
hive	52.72% <ø> (ø)
mysql	78.46% <ø> (-0.02%)	⬇️
postgres	78.54% <ø> (?)
presto	52.65% <ø> (ø)
python	82.39% <ø> (+0.06%)	⬆️
sqlite	77.04% <ø> (ø)
unit	52.63% <ø> (ø)

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see 10 files with indirect coverage changes

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