[PRDP-161] feat: Improve temp file handling

[gioelemella]

List of Changes

• create temp directory at the beginning of the function execution
• clear the temp directory at the end of the function execution
• avoid to create the temp directory on PDF Engine response
• updated unit tests

Motivation and Context

Reduce the operation on file system to improve performance

How Has This Been Tested?

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 not work as expected)

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[github-actions]

Comment this PR with update_code to update openapi.json and format the code. Consider to use pre-commit to format the code.

[sonarcloud]

SonarCloud Quality Gate failed.   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
2 Code Smells

73.6% Coverage
0.0% Duplication

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[pasqualespica]

great 🚀