add tumbleweed migration for uyuni

[jcayouette]

Summary

Adds step-by-step guides to migrate an Uyuni Server and an Uyuni Proxy from SUSE Micro 5.5 to a fresh openSUSE Tumbleweed host.

Both pages follow the Uyuni docs style, include clear commands, cautions, and optional steps, and note current limitations.
Changes

New/updated pages:

[migrate-uyuni-server-from-micro55-tumbleweed.adoc]

• Backup/restore flow using mgradm backup/restore
• Repo setup for tools, explicit podman install note
• Optional persistent storage prep via mgr-storage-server
• Verification and troubleshooting notes

[migrate-uyuni-proxy-from-micro55-tumbleweed.adoc]

• Backup /etc/uyuni and capture Apache/Squid tuning file paths from systemd
• Re-register host using the system reactivation key
• Install mgrpxy and podman; restore config
• Run mgrpxy install podman with optional --tuning-httpd/--tuning-squid
• Verification and troubleshooting notes

Why

Tumbleweed becomes the new base OS for Uyuni; we need practical migration instructions for both Server and Proxy.
Captures real-world steps validated by smoke tests on minimal setups.

[0rnela]

Procedure names are written in gerund form.
Otherwise, lgtm.

[jcayouette]

@0rnela Thank you. You are right of course. Preferred method is gerunds.

[deneb-alpha]

• on Uyuni we run on openSUSE Leap Micro 5.5, not on SUSE Micro 5.5
• the TW client tools stable will be available with the next release, no need to use Master in the documentation

[raulillo82]

Agree to Marina's requests, it needs to be Stable and not Master. Other than that, I rendered everything and it was looking fine, so we can probably approve and merge once the suggestions are committed.

[jcayouette]

All set, thank you @deneb-alpha and @raulillo82 .

[raulillo82]

This one was left over in the first review, sorry!

[deneb-alpha]

I think in the Proxy doc there are wrong references to the server repos and packages, but it could be I'm just confused

[deneb-alpha]

Suggested change

	zypper in mgrpxy mgrctl mgradm-bash-completion mgrctl-bash-completion
	zypper in mgrpxy mgrctl mgrpxy-bash-completion mgrctl-bash-completion

this is the proxy, no mgradm, I suppose it was a typo.

[deneb-alpha]

Suggested change

	zypper ar https://download.opensuse.org/repositories/systemsmanagement:/Uyuni:/Stable/images/repo/Uyuni-Server-POOL-x86_64-Media1 uyuni-server-stable
	zypper ar https://download.opensuse.org/repositories/systemsmanagement:/Uyuni:/Stable/images/repo/Uyuni-Proxy-POOL-x86_64-Media1 uyuni-proxy-stable

if you are installing things on the proxy you should use the proxy repos, or am I missing something?

[deneb-alpha]

About the list of packages to install, on paper it should just work out of the box installing Uyuni-Proxy-release that should pull in all the others. we should test this again, but it should just work