Feature: Update reporter templates to support different wording for severity. (Redmine issue: #7567)

(Redmine issue: #6227)

* Upgrade steps to PostgreSQL v14 from v13 are added.
* Upgrade steps for older versions are removed, a warning directing
  the user to older Mentat versions for them is added.

(Redmine issue: #7555)

(Redmine issue: #7549)

Installation of geoipudate tool removes the symlink, that was already
prepared for everything to work seamlesly.

(Redmine issue: #7548)

Previously the Makefile wrongly expected the appropriate configuration in SSH`s
config file.

(Redmine issue: #7041,#7548)

(Redmine issue: #6227)

(Redmine issue: #6227)

(Redmine issue: #6227)

(Redmine issue: #6227)

Fix: Add not null constraint to emails_medium, emails_high and emails_critical. (Redmine issue: #6227)

(Redmine issue: #6227)

Seee the issue for details.

(Redmine issue: #7382)

(Redmine issue: #6205)

(Redmine issue: #7041)

As it turns out some of the files were never part of the Mentat package.

(Redmine issue: #7542)

(Redmine issue: #7106)