feat: adapt PlatformTestingTool to work with Bytes for system transactions

[IvanKavaldzhiev]

Description:
Enhance PlatformTestingTool to work with Bytes format for StateSignatureTransactions.

Related issue(s):

Fixes #17082

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[andrewb1269hg]

Review and approve platform-sdk/platform-apps/tests/PlatformTestingTool/build.gradle.kts

[codacy-production]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
✅ +0.77% (target: -1.00%)	✅ 57.97%

Coverage variation details

	Coverable lines	Covered lines	Coverage
Common ancestor commit (c0ce03a)	96354	69049	71.66%
Head commit (1bb6b8a)	96397 (+43)	69826 (+777)	72.44% (+0.77%)

Coverage variation is the difference between the coverage for the head and common ancestor commits of the pull request branch: <coverage of head commit> - <coverage of common ancestor commit>

Diff coverage details

	Coverable lines	Covered lines	Diff coverage
Pull request (#17367)	138	80	57.97%

Diff coverage is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: <covered lines added or modified>/<coverable lines added or modified> * 100%

See your quality gate settings    Change summary preferences

_{Codacy stopped sending the deprecated coverage status on June 5th, 2024. Learn more}

[codecov]

Codecov Report

Attention: Patch coverage is 56.52174% with 60 lines in your changes missing coverage. Please review.

Project coverage is 68.48%. Comparing base (c0ce03a) to head (1bb6b8a).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...swirlds/demo/platform/PlatformTestingToolMain.java	44.23%	28 Missing and 1 partial ⚠️
.../com/swirlds/demo/platform/PttTransactionPool.java	0.00%	19 Missing ⚠️
...wirlds/demo/platform/PlatformTestingToolState.java	81.53%	11 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #17367      +/-   ##
============================================
+ Coverage     67.78%   68.48%   +0.70%     
- Complexity    22181    22362     +181     
============================================
  Files          2587     2587              
  Lines         96571    96614      +43     
  Branches      10082    10085       +3     
============================================
+ Hits          65457    66168     +711     
+ Misses        27370    26637     -733     
- Partials       3744     3809      +65     

Files with missing lines	Coverage Δ
.../java/com/swirlds/demo/platform/PayloadConfig.java	84.94% <100.00%> (+33.33%)	⬆️
...wirlds/demo/platform/PlatformTestingToolState.java	34.99% <81.53%> (+34.99%)	⬆️
.../com/swirlds/demo/platform/PttTransactionPool.java	21.92% <0.00%> (+0.95%)	⬆️
...swirlds/demo/platform/PlatformTestingToolMain.java	37.72% <44.23%> (+37.72%)	⬆️

... and 24 files with indirect coverage changes

[andrewb1269hg]

Review and approve platform-sdk/platform-apps/tests/PlatformTestingTool/build.gradle.kts