[MariaDB] - Rolling back Security Patches 10.5.21 to 10.5.17

[viktor-kovacs]

Reason: The 10.5.21 release blocking connection on various system

Reverting back the following PRs:
[MariaDB] - Security Patches upgrade to 10.5.21: #5313
rename metric in alert: #5339

[IvoGoman]

Do we need to downgrade the mysqld exporter as well? v0.12.1 is 2 years old and the GH repo states that the exporter currently supports MariaDB >=10.3. If this is just a precaution, then I am fine with it.

[businessbean]

Do we need to downgrade the mysqld exporter as well? v0.12.1 is 2 years old and the GH repo states that the exporter currently supports MariaDB >=10.3. If this is just a precaution, then I am fine with it.

• 0.12.0 has no official MariaDB support https://github.com/prometheus/mysqld_exporter/tree/release-0.12#mysql-server-exporter-
• 0.13.0 supports 10.2 and newer https://github.com/prometheus/mysqld_exporter/tree/release-0.13#mysql-server-exporter-
• 0.14.0 supports 10.2 and newer https://github.com/prometheus/mysqld_exporter/tree/v0.14.0#mysql-server-exporter-

0.14.0 would still be the preferred version. It is just not the complete rollback that Viktor wants to achieve.

[viktor-kovacs]

The roll back is only temporary and all the changes should be rolled back.

[businessbean]

lgtm. Let's roll back to a working version combination