Disable s3express test by default

[TingDaoK]

Issue #, if available:

• The s3express integration tests are relied on the preconfigured buckets.

Description of changes:

• Disable them by default for now (still have them enabled on CI)
• TODO: update the helper to create the directory bucket as expected. (Current blocker is the boto3 client doesn't support creating directory buckets from two different regions)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov-commenter]

Codecov Report

Merging #386 (e43c1ec) into main (de36fee) will increase coverage by 0.01%.
The diff coverage is n/a.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #386      +/-   ##
==========================================
+ Coverage   88.59%   88.61%   +0.01%     
==========================================
  Files          21       21              
  Lines        5944     5944              
==========================================
+ Hits         5266     5267       +1     
+ Misses        678      677       -1     

see 1 file with indirect coverage changes