cmd/starcoin: try to generate sign file when found multisig account in txn execution process

[templexxx]

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: #3411

What is the new behavior?

For "any" txn, checking it's multisig public key or not. If it is, generate multisig file(under default dir). If not, executing it directly.

Other information

[codecov]

Codecov Report

Merging #3461 (1c71eb0) into master (2d55f96) will decrease coverage by 0.18%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #3461      +/-   ##
==========================================
- Coverage   31.95%   31.77%   -0.17%     
==========================================
  Files         500      500              
  Lines       46806    46844      +38     
  Branches    21306    21367      +61     
==========================================
- Hits        14951    14879      -72     
- Misses      17693    17695       +2     
- Partials    14162    14270     +108     

Flag	Coverage Δ
unittests	31.77% <ø> (-0.17%)	⬇️

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

Impacted Files	Coverage Δ
cmd/starcoin/src/cli_state.rs	53.66% <ø> (ø)
vm/move-package-manager/src/lib.rs	7.70% <0.00%> (-42.30%)	⬇️
vm/natives/src/account.rs	12.50% <0.00%> (-18.75%)	⬇️
vm/natives/src/vector.rs	16.67% <0.00%> (-12.50%)	⬇️
config/src/account_vault_config.rs	52.18% <0.00%> (-8.69%)	⬇️
config/src/sync_config.rs	47.37% <0.00%> (-5.26%)	⬇️
config/src/metrics_config.rs	50.99% <0.00%> (-4.90%)	⬇️
state/state-tree/src/mock/mod.rs	43.48% <0.00%> (-4.34%)	⬇️
config/src/account_provider_config.rs	45.84% <0.00%> (-4.16%)	⬇️
vm/vm-runtime/src/metrics.rs	29.17% <0.00%> (-4.16%)	⬇️
... and 74 more

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[jolestar]

看看能否在集成测试中增加一个多签测试，测试通过生成文件来收集签名和发送交易。