Validate database connection before allowing a tenant to be added or setup

[MikeAlhayek]

1. Fix Validate table prefix before allowing new tenant to be added #11803
2. Fix Invalid serial number for shell descriptor during tenant setup. Validate database connection before allowing new tenant to be added #11863
3. Fix Validate database connection before setting up a tenant #11876
4. Make the table prefix separator a configurable option to allow a user to user prefix separator other than _

[hishamco]

Thanks again Mike, seems still you have a Git issue ;)

[hishamco]

I may share simpler way to fix the issue, let me try it tonight

[MikeAlhayek]

Thanks again Mike, seems still you have a Git issue ;)

Yes I see that. Please check #11825

I may share simpler way to fix the issue, let me try it tonight

Can't wait to see a simpler way.

Thank you

[Skrypt]

Fix conflicts by merging latest main branch.

[MikeAlhayek]

@Skrypt done.

[Skrypt]

This one for next triage