[PENG-2070] Allow files to be renamed in upsert routes in Jobbergate API

[fschuch]

What

• A new field was added to the upsert routes for the previous file name
• When the previous name doesn't match the new name, the file is renamed in the storage
• Fixed upsert on job-script files returning no data
• Unit tests were updated

Why

We need the users to be able to rename their files when they are being upserted.

Task: https://app.clickup.com/t/18022949/PENG-2070

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Peer Review

Please follow the upstream omnivector documentation concerning
peer-review guidelines.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.19%. Comparing base (5488fae) to head (d953d3a).

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #553      +/-   ##
==========================================
- Coverage   92.21%   92.19%   -0.02%     
==========================================
  Files          82       82              
  Lines        4431     4447      +16     
==========================================
+ Hits         4086     4100      +14     
- Misses        345      347       +2     

Flag	Coverage Δ
agent	93.51% <ø> (ø)
api	95.43% <ø> (-0.08%)	⬇️
cli	88.25% <ø> (ø)
core	95.47% <ø> (ø)

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