refactor(core-transaction-pool): pool processor to be injected directly

[air1one]

Summary

Allow pool processor to be injected directly (instead of having to use factory).

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov-io]

Codecov Report

Merging #4278 (e3ecfe3) into develop (59b9400) will decrease coverage by 86.34%.
The diff coverage is 11.11%.

@@             Coverage Diff             @@
##           develop   #4278       +/-   ##
===========================================
- Coverage    96.04%   9.70%   -86.35%     
===========================================
  Files          728     728               
  Lines        17972   17968        -4     
  Branches      2203    2203               
===========================================
- Hits         17262    1744    -15518     
- Misses         519   16129    +15610     
+ Partials       191      95       -96     

Flag	Coverage Δ
functional	?
integration	9.70% <11.11%> (-0.01%)	⬇️
unit	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...-p2p/src/socket-server/controllers/transactions.ts	0.00% <0.00%> (-100.00%)	⬇️
...-framework/src/mocks/transaction-pool-processor.ts	50.00% <0.00%> (-50.00%)	⬇️
packages/core-transaction-pool/src/processor.ts	0.00% <0.00%> (-71.16%)	⬇️
packages/core-api/src/controllers/transactions.ts	81.01% <100.00%> (-18.99%)	⬇️
packages/core/src/cli.ts	0.00% <0.00%> (-100.00%)	⬇️
packages/crypto/src/enums.ts	0.00% <0.00%> (-100.00%)	⬇️
packages/core-p2p/src/errors.ts	0.00% <0.00%> (-100.00%)	⬇️
packages/core-p2p/src/schemas.ts	0.00% <0.00%> (-100.00%)	⬇️
packages/crypto/src/constants.ts	0.00% <0.00%> (-100.00%)	⬇️
packages/core/src/commands/top.ts	0.00% <0.00%> (-100.00%)	⬇️
... and 686 more

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