Configurations: GPU Texture Compression options are not saved or compiled correctly for any config other than "Default"

[nkrapivin]

Description

As per discussion in the GameMaker Enterprise Discord server https://discord.com/channels/1226899065053122600/1226899066194231308/1339296608923418805 to use different GPU texture compression formats on different targets, one must use build configurations to set this up correctly for each texture group format.

However, I wasn't able to get this to work, I noticed that when I save my options for a different build config the changes are written to the YYP file, but when I save the project, swap to Default and swap back - the fields are reset to their values from the Default config.
Even worse, trying to run the project with a non-Default build config results in the Default options being used.

Reproduced in HYPERVIOLENT (indev Beta version) and YoYoGames's own https://github.com/YoYoGames/GM-GPUTextureCompression demo project.
Setting GPU texture compression options in the Default config only will work (reproduced in DREAMOUT for Switch), but this is very suboptimal if the game has many large texture groups.

This is blocking my progress on some console ports as this is one of the things I wanted to use to optimize RAM usage.

Steps To Reproduce

1. Load the project
2. Choose any build config that isn't Default (for example BC7 on Windows)
3. Open Tools > Texture Groups and observe that the fields are still kept from the Default config in the group "Inspector"
4. Try to run the project and observe that the compiler is still trying to use the formats from the Default config
5. Observe the issue

Which version of GameMaker are you reporting this issue for?

IDE v2024.1300.0.743 Runtime v2024.1300.0.753

Which operating system(s) are you seeing the problem on?

Windows 10.0.19045.0

Which platform(s) are you seeing the problem on?

PlayStation 4, PlayStation 5, Windows

60ab750d-0635-4181-8509-dbc7de14d47f

[stuckie]

Fixed as part of #9373

[Emc1923]

Verified as of IDE v2024.1300.0.769 Runtime v2024.1300.0.776