* [PM-22750] Add upgradeOldCipherAttachment method to CipherService
* [PM-22750] Refactor download attachment component to use signals
* [PM-22750] Better download url handling
* [PM-22750] Cleanup upgradeOldCipherAttachments method
* [PM-22750] Refactor cipher-attachments.component to use Signals and OnPush
* [PM-22750] Use the correct legacy decryption key for attachments without their own content encryption key
* [PM-22750] Add fix attachment button back to attachments component
* [PM-22750] Fix newly added output signals
* [PM-22750] Fix failing test due to signal refactor
* [PM-22750] Update copy