fix(middleware-bucket-endpoint): remove dualstack from hostname before processing

[trivikr]

Issue

Fixes #3001
Fixes #3002

Description

Removes dualstack from hostname before processing

Testing

• Unit testing
• Manual testing with repro code given in:
  • Incorrect hostname when both useAccelerateEndpoint and useDualstackEndpoint are enabled  #3001
  • Incorrect hostname for accesspoint when useDualstackEndpoint is enabled #3002

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[codecov-commenter]

Codecov Report

Merging #3003 (ad25cec) into main (f2fb280) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #3003   +/-   ##
=======================================
  Coverage   58.77%   58.77%           
=======================================
  Files         567      567           
  Lines       30364    30366    +2     
  Branches     7483     7484    +1     
=======================================
+ Hits        17845    17847    +2     
  Misses      12519    12519           

Impacted Files	Coverage Δ
...s/middleware-bucket-endpoint/src/bucketHostname.ts	100.00% <100.00%> (ø)

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[AllanZhengYP]

Thank you for fixing it!

[github-actions]

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