fix: 🐛 Prevent bucket and file deletions while bucket is moving

[ffarall]

DO NOT MERGE YET ‼️

1. Add checks to see if the bucket is being moved in:
   1. do_delete_bucket. A bucket shouldn't be deleted if it's being moved.
   2. delete_files_from_bucket. A file shouldn't be deleted from a bucket's root when there's a new MSP potentially reconstructing the bucket's Forest.
   3. delete_files_from_bsp. We avoid removing files from BSPs when the file belongs to a bucket being moved. This is so that BSPs don't delete files that the new MSP will potentially be asking of them.

TODOs:

• Adjust Fisherman's batch deletion logic to prevent sending deletions of files while their bucket is being moved.
• Consider adding extrinsic for user to cancel move bucket request. This would trickle down to MSP behaviour too.

[blacksmith-sh]

Found 1 test failure on Blacksmith runners:

Failure

Test	View Logs
tests/wallet/metamask-sdk-sign.spec.ts/MetaMask + SDK	View Logs