Bugfix: Make the vault mutable for vault operator delegation

[buffalu]

Fixes the following bugs:

• Require the vault is writable during initializing the VaultOperatorDelegation ticket
• Update the shank file -> updates clients
• Don't borrow structs as mutable unless required

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 68.42105% with 6 lines in your changes missing coverage. Please review.

Project coverage is 78.76%. Comparing base (e00767e) to head (8c4d866). Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...g_program/src/cooldown_ncn_vault_slasher_ticket.rs	0.00%	2 Missing :warning:
restaking_program/src/cooldown_ncn_vault_ticket.rs	0.00%	2 Missing :warning:
...king_program/src/cooldown_operator_vault_ticket.rs	0.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #90 +/- ## ======================================= Coverage 78.76% 78.76% ======================================= Files 85 85 Lines 8398 8398 ======================================= Hits 6615 6615 Misses 1783 1783 ```

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