Refactor game ID handling in controller and validation schemas

[Uttkarsh24]

This pull request includes changes to standardize the field names used in various game ID-related functions and validation schemas across the codebase. The main change involves replacing specific game ID fields with a more generic gameID field.

Changes to game.controller.js:

• Updated the addBgmiId function to use gameID instead of bgmiId for consistency.
• Modified the addFreeFireId function to use gameID instead of freeFireId.
• Adjusted the addValorantId function to use gameID instead of valorantId, and updated the nested properties accordingly.
• Changed the addCodmId function to use gameID instead of codmId.
• Updated the addAsphaltId function to use gameID instead of asphaltId.

Changes to gameValidatorSchema.js:

• Standardized the validation schemas to use gameID instead of specific game ID fields like bgmiId, freeFireId, valorantId, codmId, and asphaltId.