test: add unitest for oss

[Lzzzzzt]

Add some basic unitest for oss in object storage

Description

This PR is done by finishing the following tasks:

• bump opendal version to 0.48.0
• change mock framework from httpmock to wiremock
  • httpmock does not support specify the port, but unitest need to.
• add unitest for ParsedURL and ObjectStorage
• adn unitest for OSS part of ObjectStorage

More details are shown in the code

Related Issue

#496
#399

Motivation and Context

Dragonfly rust client does not support back-to-source downloading of different object storage protocols. Priority is given to supporting OSS protocol back-to-source downloads. Need to support OSS protocol in dragonfly-client-backend crate, implemented based on trait Backend and it needs to support directory recursive downloading.

[codecov]

Codecov Report

Attention: Patch coverage is 92.21557% with 13 lines in your changes missing coverage. Please review.

Project coverage is 13.82%. Comparing base (adc2bd6) to head (b23e8e4).
Report is 1 commits behind head on main.

Files	Patch %	Lines
dragonfly-client-backend/src/object_storage.rs	90.22%	13 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #647      +/-   ##
==========================================
+ Coverage   12.18%   13.82%   +1.63%     
==========================================
  Files          55       55              
  Lines       10971    11098     +127     
==========================================
+ Hits         1337     1534     +197     
+ Misses       9634     9564      -70     

Files	Coverage Δ
dragonfly-client-backend/src/http.rs	92.15% <100.00%> (+0.40%)	⬆️
dragonfly-client-backend/src/lib.rs	80.86% <ø> (ø)
dragonfly-client-backend/src/object_storage.rs	37.40% <90.22%> (+36.63%)	⬆️

[gaius-qi]

LGTM