Deprecate collectd/mysql monitor (#5538)

Author: atoulme

CHANGELOG.md

@@ -18,6 +18,7 @@
 - (Splunk) Deprecate windowslegacy monitor ([#5518](https://github.com/signalfx/splunk-otel-collector/pull/5518))
 - (Splunk) Deprecate statsd monitor. Use the [statsd receiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/statsdreceiver) instead. ([#5513](https://github.com/signalfx/splunk-otel-collector/pull/5513))
 - (Splunk) Deprecate the collectd/consul monitor. Please use the statsd or prometheus receiver instead. See https://developer.hashicorp.com/consul/docs/agent/monitor/telemetry for more information. ([#5521](https://github.com/signalfx/splunk-otel-collector/pull/5521))
+- (Splunk) Deprecate collectd/mysql monitor. Use the [mysql receiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/mysqlreceiver) instead. ([#5538](https://github.com/signalfx/splunk-otel-collector/pull/5538))
 - (Splunk) Deprecate the collectd/nginx monitor. Please use the [nginx receiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/receiver/nginxreceiver/) instead. ([#5537](https://github.com/signalfx/splunk-otel-collector/pull/5537))
 - (Splunk) Deprecate the collectd/chrony monitor. Please use the [chronyreceiver](https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/receiver/chronyreceiver) instead. ([#5536](https://github.com/signalfx/splunk-otel-collector/pull/5536))
 

internal/signalfx-agent/pkg/monitors/collectd/mysql/metadata.yaml

@@ -1,6 +1,8 @@
 monitors:
 - dimensions:
   doc: |
+    **The MySQL monitor is deprecated. Please use the mysqlreceiver instead.**
+    
     Monitors a MySQL database server using collectd's [MySQL
     plugin](https://collectd.org/wiki/index.php/Plugin:MySQL). It supports
     MySQL versions 5.x or later.

internal/signalfx-agent/pkg/monitors/collectd/mysql/mysql.go

@@ -70,5 +70,5 @@ type Monitor struct {
 
 // Configure configures and runs the plugin in collectd
 func (am *Monitor) Configure(conf *Config) error {
-	return am.SetConfigurationAndRun(conf)
+	return am.SetConfigurationAndRun(conf, collectd.WithDeprecationWarningLog("mysqlreceiver"))
 }