Use Case

`Collection.indexes()` and `Collection.indexInformation()` list index information for users.  They both support an option, `full`:

• when `true`, these APIs return the array of indexes returned from `listIndexes()`.
• when `false`, these APIs aggregate the index information into an object and return the object.

Their signatures are:

async indexes(options?: IndexInformationOptions): Promise<Document[]>
async indexInformation(options?: IndexInformationOptions): Promise<Document> 

The correct signatures are probably:

async indexes(options?: IndexInformationOptions): Promise<Document[] | Document>
async indexInformation(options?: IndexInformationOptions): Promise<Document[] | Document> 

User Impact

• Users may be getting Typescript errors using `indexes()` or `indexInformation()`.

Dependencies

• n/a

Unknowns

• n/a

Acceptance Criteria

Implementation Requirements

• Update the return type of these APIs to reflect that when `full` is false, an object is returned and when `full` is true, and array is returned.

Testing Requirements

• type tests. this behavior is covered with integration tests after https://github.com/mongodb/node-mongodb-native/pull/4034

Documentation Requirements

• n/a

Follow Up Requirements

• n/a