fix for SCA proxy bugs

[ilandn]

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
3 Code Smells

No Coverage information
0.0% Duplication

[cx-umesh-waghode]

The changes done for 573 will break the PAC proxy use case and also the case when proxy parameters are configured directly on the agent, not in the pipeline.