[Ingest Manager] Clean action store after enrolling to new configurat…

…ion (#18656) (#18713)

* clear actions after new enroll

x-pack/elastic-agent/CHANGELOG.asciidoc

@@ -36,6 +36,7 @@
 - Stop monitoring on config change {pull}18284[18284]
 - Fix jq: command not found {pull}18408[18408]
 - Avoid Chown on windows {pull}18512[18512]
+- Clean action store after enrolling to new configuration {pull}18656[18656]
 
 ==== New features
 

x-pack/elastic-agent/pkg/agent/application/enroll_cmd.go

@@ -10,6 +10,7 @@ import (
 	"io"
 	"net/http"
 	"net/url"
+	"os"
 
 	"gopkg.in/yaml.v2"
 
@@ -179,6 +180,12 @@ func (c *EnrollCmd) Execute() error {
 		return err
 	}
 
+	// clear action store
+	// fail only if file exists and there was a failure
+	if err := os.Remove(info.AgentActionStoreFile()); !os.IsNotExist(err) {
+		return err
+	}
+
 	return nil
 }