fix: DeployVault, updated Vault and Factory contracts

[apoorvlathey]

Issue:
After an upgrade to the Vault implementation, new deploys for the vaults started reverting. The issue was that during vault initialization, within the onlyPrivileged check, if manager was not set yet then the msg.sender (in this case the VaultFactory) was checked against the owner which is the vaultFactory.owner().

Fix:

1. We set the manager to be the msg.sender in the vault's initialization function
2. The vault factory then sets the actual user as the manager
3. The transferOwnership call after that has been removed as all the vaults refer to the vault factory's owner. This allows us to transfer the ownership of the vault factory once, and all the vaults automatically refer to the new owner.

Tests:
Added local + forked mainnet tests which are passing successfully.

[tomwade]

Tests seem solid, so if they are passing my comments are probably moot. As I'm new to the codebase though, just asked 2 questions 👍