Export process mode

https://redmine.teklia.com/issues/7497

To allow the frontend to distinguish between regular Workers processes and export processes, we need a new Export process mode.

• The following endpoints should not work on export processes:

  • StartProcess (export processes will be automatically created and started, so it isn't necessary); ✅
  • CreateWorkerRun ✅
  • UpdateWorkerRun ✅
  • PartialUpdateWorkerRun ✅
  • DestroyWorkerRun ✅
  • CreateProcessTemplate ✅
  • ApplyProcessTemplate ✅
  • SelectProcessFailures ✅
  • CreateProcessFailures ✅
  • CreateProcessSet ✅
  • DestroyProcessSet ✅
  • ClearProcess ✅

  No actual change should be required as those endpoints are restrictive, but please make sure some unit tests check this for each endpoint, specifically with this new Export mode.

• UpdateProcess and PartialUpdateProcess should allow renaming an export process. ✅

• ListWorkerRuns should allow listing the worker runs of an export process. ✅

• ListProcess should allow filtering with ?mode=export. ✅

• RetryProcess should allow retrying an export process.