[Mutations Testing] Highlighting Functions not fully covered by their tests

[ASuciuX]

Is your feature request related to a problem? Please describe.
Some functions don't have all their cases covered.

Describe the solution you'd like
This issue aims to keep track of them, update the CI to pass for the moment with these functions skipped.
It also intends to add TODO comments as references for these functions so the other developers are aware of which functions should have their tests updated.

Additional context
This is an example of a workflow summary that will be updated in the code
https://github.com/stacks-network/stacks-core/actions/runs/8361354334
The missed will have specified that in the todo, the unviable as well.

Link the solution to the documentation https://github.com/stacks-network/stacks-core/blob/next/docs/ci-release.md#mutation-testing

PRs covered

• Update StackStxOp to include signer key #4412
• Add cycle-id ranges to synthetic pox events #4414
• Fixes discovered while bringing up the pre-launch testnet #4527
• Chore: Remove Boxing of SymbolicExpressions #4530
• feat: add config parameters for burn block start #4556
• Add affirmation overrides config option and add default xenon ones ne… #4560
• Disable Microblocks in Epoch 2.5 #4561
• Merge develop into next #4575
• 2.5: PoX missed-slot updates #4576
• fix: allow nakamoto-neon mode #4578