Fix: gov-action-loader: remove old cardano-cli dependency

[mesudip]

List of changes

• Remove cardano-cli from gov-action-loader backend
• Use tx-hash from kuber's transaction response

Checklist

• My changes generate no new warnings
• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the changelog
• I have added tests that prove my fix is effective or that my feature works

[NabinKawan]

Looks good!