[API guide] API field parameter description changes for SDK v4

Some descriptions for key field parameters in the Server API guide have been changed to the parameter descriptions used in SDK v4, and some Analytics API guides have been removed.

Changes to the user_id, vid, and player_id field parameter descriptions

Descriptions for the following key fields among the request parameters of the Authentication, Access restriction, Promotion, and Billing APIs have been changed to the parameter descriptions used in SDK v4.

• user_id: In SDK v0 and v1, this meant uid or vid; it has been changed to refer to the player_id used in SDK v4.
• vid: In SDK v1 (Auth v1), this meant VID; it has been changed to refer to the playerID managed in SDK v4 (Auth v4).
• player_id: In SDK v0 or v1, this meant uid or vid; it has been changed to refer to the playerID managed in SDK v4 (Auth v4).

Partial removal of Analytics API guides

Because some Analytics APIs are no longer used in SDK v4, only the Log query API guide is maintained, and the rest have been removed.