Update mac handling in decrypting vault items to discard invalid items

[Hinton]

Type of change

- [x] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

Tweaks the decryption logic to discard bad data rather than returning an error. We should re-evaluate this in the future and potentially include some metadata about the failure so that the applications can show a warning about corrupt data.

Before you submit

• Please add unit tests where it makes sense to do so

[codecov]

Codecov Report

Attention: 45 lines in your changes are missing coverage. Please review.

Comparison is base (b174e49) 50.05% compared to head (3488789) 50.01%.

Files	Patch %	Lines
crates/bitwarden/src/vault/cipher/identity.rs	0.00%	18 Missing ⚠️
crates/bitwarden/src/vault/cipher/cipher.rs	0.00%	12 Missing ⚠️
crates/bitwarden/src/vault/cipher/card.rs	0.00%	6 Missing ⚠️
crates/bitwarden/src/vault/cipher/login.rs	0.00%	4 Missing ⚠️
crates/bitwarden/src/vault/cipher/field.rs	0.00%	2 Missing ⚠️
crates/bitwarden/src/vault/collection.rs	0.00%	1 Missing ⚠️
crates/bitwarden/src/vault/folder.rs	0.00%	1 Missing ⚠️
crates/bitwarden/src/vault/password_history.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #516      +/-   ##
==========================================
- Coverage   50.05%   50.01%   -0.05%     
==========================================
  Files         161      161              
  Lines        7849     7862      +13     
==========================================
+ Hits         3929     3932       +3     
- Misses       3920     3930      +10     

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