Adjust framework functionalities for the new dependencies paths

[kiril-keranov]

After recent dependency updates with regard to automatic PR creation from the dependency pipeline and cflinuxfs5 adjustments some of the jar dependencies paths and names were changed. Adapting the corresponding frameworks and tests with regard to these changes.
Linked to #1281, #1278, #1273, #1271, #1272

[ramonskie]

f.jarPath is always an empty string "" at the start of Supply(). os.Stat("") always returns "not found", so the JAR is re-downloaded on every staging — the caching optimization is bypassed entirely.

Fix: Construct the expected path before the existence check (as the original code did), or call constructJarPath first and only download if it fails.

[kiril-keranov]

f.jarPath is always an empty string "" at the start of Supply(). os.Stat("") always returns "not found", so the JAR is re-downloaded on every staging — the caching optimization is bypassed entirely.

Fix: Construct the expected path before the existence check (as the original code did), or call constructJarPath first and only download if it fails.

This was for the cf-metrics-exporter framework modifications right, I changed it