feat(partitions): implement partition background tasks

[numinnex]

This PR adds support for background tasks for partitions (segment cleaners). Additionally it adds support for DeleteSegment and PurgeTopic.

[codecov]

Codecov Report

❌ Patch coverage is 34.40308% with 511 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.80%. Comparing base (307fdb1) to head (80fb685).

Files with missing lines	Patch %	Lines
core/partitions/src/iggy_partition.rs	36.76%	215 Missing ⚠️
core/metadata/src/stm/stream.rs	52.41%	64 Missing and 5 partials ⚠️
core/server-ng/src/dispatch.rs	0.00%	67 Missing ⚠️
core/metadata/src/impls/metadata.rs	0.00%	41 Missing and 1 partial ⚠️
core/shard/src/router.rs	0.00%	34 Missing ⚠️
core/shard/src/lib.rs	0.00%	32 Missing ⚠️
core/server-ng/src/segment_cleaner.rs	0.00%	29 Missing ⚠️
core/server-ng/src/bootstrap.rs	0.00%	16 Missing ⚠️
core/server-ng/src/partition_reconciler.rs	80.00%	2 Missing and 4 partials ⚠️
core/consensus/src/observability.rs	0.00%	1 Missing ⚠️

❌ Your patch check has failed because the patch coverage (34.40%) is below the target coverage (50.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3564      +/-   ##
============================================
- Coverage     74.07%   73.80%   -0.27%     
  Complexity      937      937              
============================================
  Files          1249     1250       +1     
  Lines        128248   129018     +770     
  Branches     104116   104932     +816     
============================================
+ Hits          94994    95219     +225     
- Misses        30219    30705     +486     
- Partials       3035     3094      +59     

Components	Coverage Δ
Rust Core	74.41% <34.40%> (-0.30%)	⬇️
Java SDK	62.44% <ø> (ø)
C# SDK	71.40% <ø> (-0.66%)	⬇️
Python SDK	88.88% <ø> (ø)
PHP SDK	84.29% <ø> (ø)
Node SDK	91.35% <ø> (ø)
Go SDK	40.14% <ø> (ø)

Files with missing lines	Coverage Δ
core/binary_protocol/src/consensus/operation.rs	96.55% <100.00%> (+0.12%)	⬆️
core/binary_protocol/src/dispatch.rs	91.63% <ø> (ø)
core/metadata/src/stm/snapshot.rs	86.01% <100.00%> (+0.11%)	⬆️
core/partitions/src/segment.rs	93.54% <100.00%> (+38.37%)	⬆️
core/consensus/src/observability.rs	41.00% <0.00%> (-0.10%)	⬇️
core/server-ng/src/partition_reconciler.rs	86.73% <80.00%> (-0.21%)	⬇️
core/server-ng/src/bootstrap.rs	7.23% <0.00%> (-0.08%)	⬇️
core/server-ng/src/segment_cleaner.rs	0.00% <0.00%> (ø)
core/shard/src/lib.rs	71.55% <0.00%> (-2.42%)	⬇️
core/shard/src/router.rs	0.00% <0.00%> (ø)
... and 4 more

... and 42 files with indirect coverage changes

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