Bump Go version to 1.23.6 (#30242)

* Bump Go version to 1.23.6

* Update CodeQL Github action as well

* Use server's Go version for CodeQL action

Co-authored-by: Antonis Stamatiou <stamatiou.antonis@gmail.com>

* Empty commit to trigger CI

* Bump golangci-lint to a version supporting Go 1.23

* Fix golangci-lint warnings

Several rules from gosimple, revive and staticcheck linters were
failing:
- Redefinition of built-in identifiers (max, min, new, recover...)
- Use of printf-like functions with simple strings
- Check for nil slices, when len already takes it into account

---------

Co-authored-by: Antonis Stamatiou <stamatiou.antonis@gmail.com>
Co-authored-by: Mattermost Build <build@mattermost.com>

server/config/logconfigsrc.go

@@ -19,7 +19,7 @@ const (
 	LogConfigSrcTypeFile LogConfigSrcType = "file"
 )
 
-type LogSrcListener func(old, new mlog.LoggerConfiguration)
+type LogSrcListener func(oldCfg, newCfg mlog.LoggerConfiguration)
 type LogConfigSrcType string
 
 // LogConfigSrc abstracts the Advanced Logging configuration so that implementations can