deterministic action pick order

[CoderZhi]

Actions are picked from action pool by gas price. However, if two actions from different accounts are of the same gas price, the order of these two actions is random. Having a deterministic order is important to unit tests which may rely on the order.

Fixes #(issue)

Type of change

Please delete options that are not relevant.

• [] Bug fix (non-breaking change which fixes an issue)
• [] New feature (non-breaking change which adds functionality)
• [] Code refactor or improvement
• [] Breaking change (fix or feature that would cause a new or changed behavior of existing functionality)
• [] This change requires a documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [] make test
• [] fullsync
• [] Other test (please specify)

Test Configuration:

• Firmware version:
• Hardware:
• Toolchain:
• SDK:

Checklist:

• [] My code follows the style guidelines of this project
• [] I have performed a self-review of my code
• [] I have commented my code, particularly in hard-to-understand areas
• [] I have made corresponding changes to the documentation
• [] My changes generate no new warnings
• [] I have added tests that prove my fix is effective or that my feature works
• [] New and existing unit tests pass locally with my changes
• [] Any dependent changes have been merged and published in downstream modules

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 4 lines in your changes are missing coverage. Please review.

Project coverage is 76.16%. Comparing base (e1f0636) to head (533284f).
Report is 197 commits behind head on master.

Files	Patch %	Lines
actpool/actioniterator/actioniterator.go	66.66%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #4175      +/-   ##
==========================================
+ Coverage   75.38%   76.16%   +0.78%     
==========================================
  Files         303      340      +37     
  Lines       25923    29063    +3140     
==========================================
+ Hits        19541    22137    +2596     
- Misses       5360     5827     +467     
- Partials     1022     1099      +77     

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[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud