Fix issues in the objectstorage based on JuiceFS use cases.

[XDTD]

Description

"Fixing issues in the object storage based on JuiceFS use cases. Mainly includes:

1. Route path of createbucket.
2. Unable to properly pass objectkey when calling copyobject.
3. Oss GetObjectMeta return not found error.
4. getObjectMetadatas does not include directories.

Related Issue

#2176

Motivation and Context

To provide support for JuiceFS objectStorage implementation.

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation Update (if none of the other choices apply)

Checklist

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.

[codecov]

Codecov Report

Merging #2648 (a2523c5) into main (85b4467) will increase coverage by 0.10%.
Report is 2 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2648      +/-   ##
==========================================
+ Coverage   51.87%   51.97%   +0.10%     
==========================================
  Files         157      157              
  Lines       21165    21165              
==========================================
+ Hits        10979    11001      +22     
+ Misses       9545     9523      -22     
  Partials      641      641              

Flag	Coverage Δ
Object-compatibility-e2etests	?
e2etests	?
unittests	51.97% <ø> (+0.10%)	⬆️

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

see 2 files with indirect coverage changes

[gaius-qi]

Add default httpclient.

[gaius-qi]

LGTM