refactor: refactor alluxio unit tests with ginkgo

[TrafalgarZZZ]

Ⅰ. Describe what this PR does

Ⅱ. Does this pull request fix one issue?

fixes #XXXX

Ⅲ. List the added test cases (unit test/integration test) if any, please explain if no tests are needed.

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

[codecov]

Codecov Report

❌ Patch coverage is 97.80622% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.76%. Comparing base (8752fd6) to head (bde22d7).
⚠️ Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
pkg/ddc/alluxio/mock_utils.go	97.80%	8 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5212      +/-   ##
==========================================
+ Coverage   55.53%   55.76%   +0.22%     
==========================================
  Files         412      413       +1     
  Lines       27540    28087     +547     
==========================================
+ Hits        15295    15663     +368     
- Misses      10831    11008     +177     
- Partials     1414     1416       +2     

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[sonarqubecloud]

Quality Gate passed

Issues
22 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
26.5% Duplication on New Code

See analysis details on SonarQube Cloud

[cheyang]

/lgtm
/approve

[fluid-e2e-bot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: cheyang

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