CICD: add CARGO_TERM_COLOR env var for colors in CI output

[tertsdiepraam]

This hopefully makes the CI output a bit prettier :)

EDIT: Seems to have worked mostly. I want to figure out how to also enable color in the tests though.

[tertsdiepraam]

Great, apparently it's due to an issue open since 2015 :)

rust-lang/cargo#1983

[tertsdiepraam]

Well, I can't get it to work in cargo test. I removed those changes and leave that for later.

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/misc/timeout. tests/misc/timeout is passing on 'main'. Maybe you have to rebase?

[github-actions]

GNU testsuite comparison:

GNU test failed: tests/tail-2/inotify-dir-recreate. tests/tail-2/inotify-dir-recreate is passing on 'main'. Maybe you have to rebase?

[sylvestre]

While I log colors, i am not a big fan in the CI. it is clobbering the raw logs:
https://pipelines.actions.githubusercontent.com/serviceHosts/91055393-6e6f-4662-ba97-3acee74a8c7c/_apis/pipelines/1/runs/20716/signedlogcontent/6?urlExpires=2023-01-27T20%3A12%3A46.9850910Z&urlSigningMethod=HMACV1&urlSignature=gbO%2Be6ji8njlwtpV7mcX87sxHkEn2Ak7VdOYlUatM1o%3D

2022-12-06T07:55:24.0549810Z �[0m�[0m�[1m�[32m   Compiling�[0m proc-macro-error v1.0.4
2022-12-06T07:55:25.6700050Z �[0m�[0m�[1m�[32m   Compiling�[0m num-bigint v0.4.3
2022-12-06T07:55:25.7502200Z �[0m�[0m�[1m�[32m   Compiling�[0m lock_api v0.4.9
2022-12-06T07:55:26.2127390Z �[0m�[0m�[1m�[32m   Compiling�[0m filetime v0.2.18

[tertsdiepraam]

Sure, I don't look at the raw logs much, but if you think it's important we can close this PR.