Stop creating the ECC collection in v2 of queryable encryption

[stIncMale]

• Reviewing commit by commit allows skipping the commit that synchronizes the tests with the specs repo.
• Creating a collection with encryptedFields specified now requires MongoDB 7.0+, which is why I specified @mongodb.server.release 7.0 everywhere encryptedFields is used (the driver does not do the check when dropping a collection, but it still does not seem meaningful to document DropCollectionOptions.encryptedFields any different than other places).
• CreateCollectionOptions.encryptedFields/DropCollectionOptions.encryptedFields were not documented as @Beta, which appears to be a mistake, given that the whole queryable encryption feature is in preview. I documented them as such.

JAVA-4858

[stIncMale]

@jyemin I added you because I'd like to have you reviewed specific commit that updates the API docs: 34f38d0.

[jyemin]

LGTM on the Javadoc. A few implementation questions/comments.