Fix temp dir issue for testing

[cheyang]

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

[fluid-e2e-bot[bot]]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Once this PR has been reviewed and has the lgtm label, please ask for approval from cheyang by writing /assign @cheyang in a comment. For more information see:The Kubernetes Code Review Process.

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[sonarqubecloud[bot]]

Quality Gate passed

Issues
4 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
57.1% Duplication on New Code

See analysis details on SonarQube Cloud

[TrafalgarZZZ]

/test fluid-e2e

[cheyang]

/test fluid-e2e