Disable BlockHound reporting for Kubernetes client testing

[ikhoon]

Motivation:

It is inconvient and time-consuming to check all CI results due to the false-positive BlockHound reports. Therefore, I propose disabling BlockHound reporting until the patched version is released.

Modifications:

• Add FastThreadLocalRunnable.run to allowBlockingCallsInside for disabling the reports

Result:

Less noisy CI builds

[github-actions]

🔍 Build Scan® (commit: 3c742ae)

Job name	Status	Build Scan®
build-ubicloud-standard-16-jdk-8	✅	https://ge.armeria.dev/s/jjfsq3moiurtc
build-ubicloud-standard-16-jdk-21-snapshot-blockhound	✅	https://ge.armeria.dev/s/q4ojgkz7r6oei
build-ubicloud-standard-16-jdk-17-min-java-17-coverage	✅	https://ge.armeria.dev/s/mqwp46nq23dfw
build-ubicloud-standard-16-jdk-17-min-java-11	✅	https://ge.armeria.dev/s/yhvf4haeaiwdg
build-ubicloud-standard-16-jdk-17-leak	✅	https://ge.armeria.dev/s/w5l2drtbf7l5k
build-ubicloud-standard-16-jdk-11	✅	https://ge.armeria.dev/s/mlqqtqqlpbtpk
build-macos-latest-jdk-21	✅	https://ge.armeria.dev/s/net2tjfzcfbss

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 0.00%. Comparing base (8150425) to head (3c742ae).
⚠️ Report is 127 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #6329       +/-   ##
============================================
- Coverage     74.46%       0   -74.47%     
============================================
  Files          1963       0     -1963     
  Lines         82437       0    -82437     
  Branches      10764       0    -10764     
============================================
- Hits          61385       0    -61385     
+ Misses        15918       0    -15918     
+ Partials       5134       0     -5134     

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