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/public/pluginapi/experimental/bot/logger/test_logger.go

@@ -52,7 +52,7 @@ func (l *testLogger) logf(prefix, format string, args ...interface{}) {
 		measure(l.logContext)
 		out += fmt.Sprintf(" -- %+v", l.logContext)
 	}
-	l.TB.Logf(out)
+	l.TB.Log(out)
 }
 
 func (l *testLogger) Debugf(format string, args ...interface{}) { l.logf("DEBUG", format, args...) }