Description

• Builder pod contains builder and fetcher containers and they share a volume.
• Builder build the packages and fetcher uploads the packages to storage service.
• In case of build/upload failure, packages remains in the shared volume. These packages are of no use and needs to be cleaned up.
• Added a Clean API in builder package. This API will be called by buildermgr for deleting src pkg after pkg is build and deployment is uploaded. I wanted to delete the src package from builder pod directly after failed/successful build but buildermgr uses retryablehttp client so in case of build failure buildermgr will retry build by sending Build request.
• To delete deployment pkg, fetcher UploadHandler will delete the deployment pkg after successful/failed upload.

Which issue(s) this PR fixes:

Fixes #2821

Testing

• Added a negative test for builder's Clean API.
• Adding a positive test involves creating a /packages directory for which root permissions are required.Therefore, did not add any positive test.

{"level":"info","ts":"2024-07-10T10:45:48.563Z","logger":"builder","caller":"builder/builder.go:197","msg":"builder received clean request","request":{"srcPkgFilename":"hello-test-fdebb12e-60ff-4e95-b41b-e3531444a4a4-kfezxl"}}
{"level":"info","ts":"2024-07-10T10:45:48.564Z","logger":"builder","caller":"builder/builder.go:175","msg":"clean request complete","elapsed_time":0.001311227}

Checklist:

• I ran tests as well as code linting locally to verify my changes.
• I have done manual verification of my changes, changes working as expected.
• I have added new tests to cover my changes.
• My changes follow contributing guidelines of Fission.
• I have signed all of my commits.