error out with invalid option when createCollection

[Yuqi-Du]

When user provides an invalid option when createCollection,
currently, we have three options (case sensitive): vector, vectorize, indexing

Example:

{
    "createCollection": {
        "name": "tableEx",
        "options": {
            "Yuqi": {}
        }
    }
}

{
    "errors": [
        {
            "message": "The provided options is invalid: No option "Yuqi" found as createCollectionCommand option,  (known options: "indexing", "vector")",
            "errorCode": "INVALID_CREATE_COLLECTION_OPTIONS"
        }
    ]
}

Which issue(s) this PR fixes:
Fixes #828

Checklist

• Changes manually tested
• Automated Tests added/updated
• Documentation added/updated
• CLA Signed: DataStax CLA

[tatu-at-datastax]

This is helpful: but even more helpful I think would be listing 2 existing options in addition?
Something like:

"No option \"%s\" found as createCollectionCommand option (known options: \"indexing\", \"vector\")",

[tatu-at-datastax]

(not sure if "vectorize" should be included; it is technically allowed, but not publicly supported.

[Yuqi-Du]

solved, thanks

[tatu-at-datastax]

Looks good: added suggestions. Interesting way of dealing with the issue, nice!

[vkarpov15]

LGTM