Make --listTests return a new line separated list when not using --json

[mjesun]

Right now, when using the --listTests flag, no matter which other flags you use, the result is reported via console.log using JSON format. This makes difficult to use Jest output with other terminal tools, like grep, awk or for .. in.

I would suggest the following changes:

• Return a joined \n list when --json is not passed.
• Use process.stdout.write instead of console.log.

[cpojer]

Agreed!

[rogeliog]

I can help with this

[mjesun]

That would be great, thanks @rogeliog :)

[github-actions]

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