Workflow improvements

[IvanSavenko]

Trying to implement some of the todo's mentioned in PR #2

List of changes

• Conan dependencies installation is now a separate step in CI, package name is now defined as parameter in matrix
• Before install script is now defined as parameter in matrix, to remove identical files
• Renamed platforms names to use form (OS-architecture)
• All binaries have been rebuilt on CI (with exception of libiconv on Android which fails due to weird bug)
• Switched mingw CI from ubuntu 22.04 to ubuntu 24.04 and removed previously required workarounds
• Switched Android CI from macos to ubuntu to reduce number of macos CI runners
• Disabled building of boost_url since it is not used by vcmi
• Updated SDL packages with all its components, updated settings of SDL_image and SDL_mixer to match upstream changes
• Added removal of all build tools, like cmake in addition to android SDK to reduce size of output package

[IvanSavenko]

Probably done for now, will now try to create release & build vcmi with resulting packages