Ensure CDPUpdated event emits expected values after every operation

[dapp-whisperer]

CDPUpdated event was previously emitted from both BorrowerOperations and CdpManager, leading to confusion especially around the enum statuses which have a different meaning depending on which contract they come from.

• now the event will only be emitted from the CdpManager.
• The operation type enums will be consolidated onto the CdpManager.

Ensure events are emitted properly from each CDP Operation on #531

BorrowerOperations

• open
• adjust (all variants)
• close

CdpManager

• liquidation (all variants)
• redemption (all variants)