Update postgresqlcheck.py report

[fila43]

Improve the report to clarify the upgrade path for already upgraded PostgreSQL

jira: RHEL-67719
Resolves: #1183

[github-actions]

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It is possible to schedule specific on-demand tests as well. Currently 2 test sets are supported, beaker-minimal and kernel-rt, both can be used to be run on all upgrade paths or just a couple of specific ones.
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