Add option to build without debug symbols

[tmatth]

No description provided.

[lu-zero]

It depends on the main project settings (e.g. rav1e always produce debug symbols), changing it would require to edit the cargo toml or use cargo-as-a-library and do something even more ugly.

[lu-zero]

We now use cargo-as-a-library, it is still quite ugly to do an override, but the same way used in normal cargo should work (should be tested)

[lu-zero]

Probably would be good to start discussing with upstream cargo about supporting debug=split and/or override the profiles.