Add the option to skip loading VaultPress

There’s now the option to skip loading VaultPress code entirely, which can be useful if it’s not being used.

Some considerations need to be taken to disable VaultPress if it has been used before. So in case you are interested, please open a support ticket to get more information.

https://github.com/Automattic/vip-go-mu-plugins/pull/1965

#mu-plugins, #vaultpress