8marz8

Results 5 issues of 8marz8

### Description This PR includes RewardSet data in new_block events instead of broadcasting a separate event. Note: This Draft PR is not completed and only has the initial tweaks to...

### Description Following the signer-key authorization in #4377, this PR updates stack-stx burn op (StackStxOp) to include signer-key. ### Applicable issues - closes #4285

### Description Removing UserBurnSupportOp definition and usage throughout the codebase as it's not fully implemented and used. ### Applicable issues - closes #4071

### Description Enhancements are being made to signer messages by including coordinator metadata that reflects each signer's view of the stacks chain. This allows signers to compare the received metadata...