[DOP-15023] Pass Run to CREATE_SPARK_SESSION_FUNCTION

[dolfinus]

Change Summary

• Pass Run object to CREATE_SPARK_SESSION_FUNCTION, and use it as a source for Spark Session appName
• Streamline Handler object - instead of creating one-time attributes reader, writer and spark, create them only then needed
• Move file format handling to FileTransferDTO

Related issue number

Checklist

• Commit message and PR title is comprehensive
• Keep the change as small as possible
• Unit and integration tests for the changes exist
• Tests pass on CI and coverage does not decrease
• Documentation reflects the changes where applicable
• docs/changelog/next_release/<pull request or issue id>.<change type>.rst file added describing change
  (see CONTRIBUTING.rst for details.)
• My PR is ready to review.

[codecov]

Codecov Report

Attention: Patch coverage is 97.20280% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 92.44%. Comparing base (67a17b0) to head (0522b25).

Files	Patch %	Lines
syncmaster/dto/transfers.py	91.66%	1 Missing and 2 partials ⚠️
syncmaster/worker/transfer.py	85.71%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop      #38      +/-   ##
===========================================
+ Coverage    91.84%   92.44%   +0.59%     
===========================================
  Files           83       84       +1     
  Lines         2440     2421      -19     
  Branches       308      306       -2     
===========================================
- Hits          2241     2238       -3     
+ Misses         140      128      -12     
+ Partials        59       55       -4     

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