(Java Parity) Allow command blocks to change gamemode in hardcore mode

This idea is intended for custom hardcore maps. In Java Edition, command blocks are able to change a player's gamemode in hardcore, enabling more map choices like spectator mode for cutscenes or adventure hardcore for special areas. In Bedrock Edition, command blocks are not able to change a player's gamemode in hardcore, severely limiting map options. Command blocks should be able to change a player's gamemode in hardcore for Bedrock Edition.