deprecate telegraf/exec (#5171)

* deprecate telegraf/exec

* Update CHANGELOG.md

Co-authored-by: Aunsh Chaudhari <aunshc@splunk.com>

---------

Co-authored-by: Aunsh Chaudhari <aunshc@splunk.com>

CHANGELOG.md

@@ -11,6 +11,10 @@
 
 - (Splunk) Deprecate the collectd/health-checker plugin ([#5167](https://github.com/signalfx/splunk-otel-collector/pull/5167))
 
+### 🚩Deprecations 🚩
+
+- (Splunk) Deprecate the telegraf/exec monitor ([#5171](https://github.com/signalfx/splunk-otel-collector/pull/5171))
+
 ## v0.105.0
 
 This Splunk OpenTelemetry Collector release includes changes from the [opentelemetry-collector v0.105.0](https://github.com/open-telemetry/opentelemetry-collector/releases/tag/v0.105.0) and the [opentelemetry-collector-contrib v0.105.0](https://github.com/open-telemetry/opentelemetry-collector-contrib/releases/tag/v0.105.0) releases where appropriate.

internal/signalfx-agent/pkg/monitors/telegraf/monitors/exec/exec.go

@@ -58,6 +58,8 @@ var factory = telegrafInputs.Inputs["exec"]
 // Configure the monitor and kick off metric syncing
 func (m *Monitor) Configure(conf *Config) (err error) {
 	m.logger = logger.WithField("monitorID", conf.MonitorID)
+	m.logger.Warn("[NOTICE] The telegraf/exec monitor is deprecated and will be removed in a future release.")
+
 	m.plugin = factory().(*telegrafPlugin.Exec)
 
 	cumulativeCounterSet := utils.StringSliceToMap(conf.SignalFxCumulativeMetrics)

internal/signalfx-agent/pkg/monitors/telegraf/monitors/exec/metadata.yaml

@@ -1,6 +1,8 @@
 monitors:
 - dimensions:
   doc: |
+    The telegraf/exec monitor is deprecated and will be removed in a future release.
+    
     This is an embedded form of the [Telegraf Exec
     plugin](https://github.com/influxdata/telegraf/tree/master/plugins/inputs/exec).
     The plugin-specific config options are the same as that plugin, but parser