add faucet output as var context

[pause125]

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: N/A

What is the new behavior?

• mpm faucet 输出交易信息和结果，可以用来获取相关信息，比如获取接受 faucet 的地址。$.faucet[0].txn.raw_txn.decoded_payload.ScriptFunction.args[0]

Other information

[baichuan3]

从faucet中获取address给个示例呗

[pause125]

从faucet中获取address给个示例呗

前面 pr 说明里面有的

[codecov]

Codecov Report

Merging #3685 (6c1bca8) into master (cb0549f) will decrease coverage by 0.23%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #3685      +/-   ##
==========================================
- Coverage   28.86%   28.64%   -0.22%     
==========================================
  Files         588      588              
  Lines       50410    50411       +1     
  Branches    23656    23657       +1     
==========================================
- Hits        14544    14433     -111     
- Misses      21862    22190     +328     
+ Partials    14004    13788     -216     

Flag	Coverage Δ
unittests	28.64% <0.00%> (-0.22%)	⬇️

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

Impacted Files	Coverage Δ
vm/starcoin-transactional-test-harness/src/lib.rs	0.15% <0.00%> (-<0.01%)	⬇️
...ccount_config/resources/module_upgrade_strategy.rs	25.72% <0.00%> (-17.14%)	⬇️
vm/types/src/language_storage_ext.rs	29.17% <0.00%> (-12.50%)	⬇️
vm/types/src/on_chain_config/vm_config.rs	35.00% <0.00%> (-10.00%)	⬇️
vm/types/src/transaction_metadata.rs	55.23% <0.00%> (-8.95%)	⬇️
vm/transaction-builder/src/lib.rs	14.43% <0.00%> (-8.31%)	⬇️
abi/decoder/src/lib.rs	1.46% <0.00%> (-7.29%)	⬇️
sync/src/block_connector/test_write_block_chain.rs	25.59% <0.00%> (-6.20%)	⬇️
network-rpc/core/src/lib.rs	20.00% <0.00%> (-6.00%)	⬇️
rpc/api/src/contract_api.rs	11.12% <0.00%> (-5.55%)	⬇️
... and 98 more

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