Release of Vitess v12.0.6

Major Changes

Upgrade to go1.17.13

Vitess v12.0.6 now runs on go1.17.13.
The patch release of Go, go1.17.13, was the main reason for this release as it includes important security fixes to packages used by Vitess.
Below is a summary of this patch release. You can learn more here.

go1.17.13 (released 2022-08-01) includes security fixes to the encoding/gob and math/big packages, as well as bug fixes to the compiler and the runtime.

End of life of MariadDB 10.2

Since the end-of-life of MariaDB 10.2, its Docker image is unavailable, and we decided to remove the unit tests using this version of MariaDB. The Pull Request doing this change is available here.
This change is documented on our website here.

The entire changelog for this release can be found here.

The release includes 11 commits (excluding merges)

Thanks to all our contributors: @GuptaManan100, @dbussink, @deepthi, @frouioui, @harshit-gangal, @rohit-nayak-ps