Release of Vitess v15.0.2

Major Changes

Upgrade to go1.18.9

Vitess v15.0.2 now runs on go1.18.9.
The patch release of Go, go1.18.9, was one of the main reasons for this release as it includes an important security fixe to net/http package, which is use extensively by Vitess.
Below is a summary of this patch release. You can learn more here.

go1.18.9 (released 2022-12-06) includes security fixes to the net/http and os packages, as well as bug fixes to cgo, the compiler, the runtime, and the crypto/x509 and os/exec packages.

The entire changelog for this release can be found here.

The release includes 14 commits (excluding merges)

Thanks to all our contributors: @GuptaManan100, @dbussink, @frouioui, @mattlord, @rsajwani, @shlomi-noach, @vitess-bot[bot]