Fixes for Anet ET4

[EvilGremlin]

Fix encrypt stuff broken in #24391.
Add second env for ET4, for clarity sake.
Do TH3D_EZBoard_V2 actually use OpenBLT? Anyway, fixed encrypt there too.

Kinda fix build of COLOR_UI and CLASSIC_UI in linux, but guys say that it breaks build in windows instead... i have no idea what i'm doing.
Made it all separate commits for cherrypicking.
Don't megre that stuff without testing in different OS.

[thisiskeithb]

Kinda fix build of COLOR_UI and CLASSIC_UI in linux, but guys say that it breaks build in windows instead... i have no idea what i'm doing.

I’d recommend breaking these fixes out into a separate PR.

[rhapsodyv]

Do TH3D_EZBoard_V2 actually use OpenBLT? Anyway, fixed encrypt there too.

I think they use this: https://github.com/rhapsodyv/OpenBLT-STM32 .. but they could be changed their mind before the release.

[thisiskeithb]

Do TH3D_EZBoard_V2 actually use OpenBLT? Anyway, fixed encrypt there too.

I think they use this: https://github.com/rhapsodyv/OpenBLT-STM32 .. but they could be changed their mind before the release.

@houseofbugs would know.

[EvilGremlin]

@thisiskeithb yep, i just thrown it all together for specific machine... this PR is more for show than merge. But bugfix-2.1 is totally broken now so it's of no use anyway :(
i will tidy it up tomorrow probably.

[EvilGremlin]

Ok, apparently i'm blind and this is total garbage so i withdraw this PR until tomorrow.