logging: backend: added semihosting support

[arifbalik]

Added semihosting support in logging backend.

I was trying to get logs in a small mcu without soldering wires and opening up a communication port, and found out that there is no support for semihosting as logging backend. So I added one.

[github-actions]

Hello @arifbalik, and thank you very much for your first pull request to the Zephyr project!
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[arifbalik]

@nordic-krch I've fixed the commit body and linting issues, but it seems like Manifest failed during setting up the job

[github-actions]

Hi @arifbalik!
Congratulations on getting your very first Zephyr pull request merged 🎉🥳. This is a fantastic achievement, and we're thrilled to have you as part of our community!

To celebrate this milestone and showcase your contribution, we'd love to award you the Zephyr Technical Contributor badge. If you're interested, please claim your badge by filling out this form: Claim Your Zephyr Badge.

Thank you for your valuable input, and we look forward to seeing more of your contributions in the future! 🪁