Add option to turn off colors for logger

[mnmkng]

Some users with themed terminals are seeing invisible characters, we should allow the option to turn colors off.

Important!

The option needs to work for all child loggers, by setting it on the parent logger. E.g. when in SDK

const { log } = Apify.utils;
log.disableColors();

All existing log instances everywhere in the SDK, that were created of children of this parent instance, must also have their colors turned off.

[B4nan]

FYI colors can be (globally) disabled via FORCE_COLOR=0 env var.

[mnmkng]

Hmm, interesting. cc @Jeromearsene, the creator of the original issue.