feat: Add batch NXM withdrawal + Staking Pool fixes

[rackstar]

Overview

Audit Docs

Findings

Audit Findings

There are 2 informational comments that we decided not to address, these are both on temporary functions that will be deprecated shortly after executing:

• Index out of bounds - adding validation here merely transforms "index out of bounds" error to a nicer message. Moreover, we would have fork tests to ensure that we pass the correct parameters so this error should not happen when we invoke it on main-net
• Custom Errors - it should be inconsequential if we keep it as requires specially since it will be deprecated shortly after.

Changes proposed in this pull request

• Censoring assessors by front-running - 33485ecb
• Validate IPFS hash - 7a120f50
• Wrong Address - 77a72dc0
• Define Constants - d299b000
• Overwriting IPFS hash - 0692f728

Test plan

Add unit tests on all fixes