feat: updates sendrawtransaction methods

[konstantinabl]

Description

This PR adds the new functionality for the transaction pool in the sendRawTransactionProcessor, so before submitting a transaction and after it being validated we save/remove it.

Related issue(s)

Fixes #4393

Changes from original design (optional)

N/A

Additional work needed (optional)

N/A

Checklist

• I've assigned an assignee to this PR and related issue(s) (if applicable)
• I've assigned a label to this PR and related issue(s) (if applicable)
• I've assigned a milestone to this PR and related issue(s) (if applicable)
• I've updated documentation (code comments, README, etc. if applicable)
• I've done sufficient testing (unit, integration, etc.)

[codecov]

Codecov Report

❌ Patch coverage is 91.89189% with 3 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...thService/transactionService/TransactionService.ts	92.30%	2 Missing ⚠️
packages/relay/src/lib/eth.ts	90.00%	1 Missing ⚠️

@@                   Coverage Diff                    @@
##             feat/transaction-pool    #4444   +/-   ##
========================================================
  Coverage                         ?   85.09%           
========================================================
  Files                            ?      126           
  Lines                            ?    20302           
  Branches                         ?     1107           
========================================================
  Hits                             ?    17277           
  Misses                           ?     3008           
  Partials                         ?       17           

Flag	Coverage Δ
config-service	98.80% <ø> (?)
relay	51.58% <51.35%> (?)

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

Files with missing lines	Coverage Δ
packages/relay/src/lib/relay.ts	91.79% <100.00%> (ø)
packages/relay/src/lib/eth.ts	99.48% <90.00%> (ø)
...thService/transactionService/TransactionService.ts	88.63% <92.30%> (ø)

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[github-actions]

Test Results

 20 files  ± 0  260 suites   - 3   17m 31s ⏱️ - 17m 37s
750 tests +10  742 ✅ +12  5 💤 ±0  3 ❌  - 2 
770 runs  +16  762 ✅ +18  5 💤 ±0  3 ❌  - 2 

For more details on these failures, see this check.

Results for commit c20b8f7. ± Comparison against base commit 57c9fa1.