WIP: add processor cleanup task handler

[vangheem]

Description

This is an example of what we need to do in order to prevent deleted resources from being processed unnecessarily.

Can we do the same for...

• on prem
• entire kbs

How was this PR tested?

Describe how you tested this PR.

[codecov]

Codecov Report

Attention: 22 lines in your changes are missing coverage. Please review.

Comparison is base (59d028d) 82.13% compared to head (6469574) 82.07%.

Files	Patch %	Lines
...iadb/nucliadb/ingest/consumer/processor_cleanup.py	56.52%	10 Missing ⚠️
...ucliadb/nucliadb/common/http_clients/processing.py	12.50%	7 Missing ⚠️
nucliadb/nucliadb/ingest/consumer/service.py	28.57%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1771      +/-   ##
==========================================
- Coverage   82.13%   82.07%   -0.06%     
==========================================
  Files         335      336       +1     
  Lines       19682    19720      +38     
==========================================
+ Hits        16166    16186      +20     
- Misses       3516     3534      +18     

Flag	Coverage Δ
ingest	68.91% <50.00%> (-0.15%)	⬇️
nucliadb	70.11% <42.10%> (-0.03%)	⬇️
reader	79.82% <ø> (ø)
sdk	40.64% <ø> (ø)
standalone	88.29% <ø> (ø)
train	63.60% <ø> (ø)
utils	81.42% <ø> (ø)
writer	85.11% <ø> (ø)

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