Add burning

[buffalu]

• Adds burn to vault
• Moves fee collected from enqueue withdrawal to burn
• Removes the VRT refund for burn withdrawal ticket if not enough assets available

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 63.17690% with 204 lines in your changes missing coverage. Please review.

Project coverage is 74.55%. Comparing base (16689c5) to head (ac32220). Report is 1 commits behind head on master.

Files	Patch %	Lines
vault_program/src/burn.rs	0.00%	79 Missing :warning:
vault_core/src/vault.rs	74.30%	46 Missing :warning:
vault_sdk/src/sdk.rs	21.73%	36 Missing :warning:
...ault_core/src/vault_ncn_slasher_operator_ticket.rs	0.00%	15 Missing :warning:
...t_program/src/cooldown_vault_ncn_slasher_ticket.rs	0.00%	11 Missing :warning:
vault_program/src/cooldown_vault_ncn_ticket.rs	0.00%	10 Missing :warning:
vault_program/src/lib.rs	50.00%	4 Missing :warning:
vault_program/src/set_capacity.rs	0.00%	2 Missing :warning:
vault_program/src/burn_withdrawal_ticket.rs	97.29%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #52 +/- ## ========================================== - Coverage 75.39% 74.55% -0.84% ========================================== Files 83 83 Lines 6950 7012 +62 ========================================== - Hits 5240 5228 -12 - Misses 1710 1784 +74 ```

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