revert elastic-agent-libs bump

Author: mauri870

go.mod

@@ -176,7 +176,7 @@ require (
 	github.com/elastic/bayeux v1.0.5
 	github.com/elastic/ebpfevents v0.7.0
 	github.com/elastic/elastic-agent-autodiscover v0.10.0
-	github.com/elastic/elastic-agent-libs v0.22.1
+	github.com/elastic/elastic-agent-libs v0.21.5
 	github.com/elastic/elastic-agent-system-metrics v0.11.11
 	github.com/elastic/go-elasticsearch/v8 v8.18.1
 	github.com/elastic/go-freelru v0.16.0

go.sum

@@ -366,8 +366,8 @@ github.com/elastic/elastic-agent-autodiscover v0.10.0 h1:WJ4zl9uSfk1kHmn2B/0byQB
 github.com/elastic/elastic-agent-autodiscover v0.10.0/go.mod h1:Nf3zh9FcJ9nTTswTwDTUAqXmvQllOrNliM6xmORSxwE=
 github.com/elastic/elastic-agent-client/v7 v7.15.0 h1:nDB7v8TBoNuD6IIzC3z7Q0y+7bMgXoT2DsHfolO2CHE=
 github.com/elastic/elastic-agent-client/v7 v7.15.0/go.mod h1:6h+f9QdIr3GO2ODC0Y8+aEXRwzbA5W4eV4dd/67z7nI=
-github.com/elastic/elastic-agent-libs v0.22.1 h1:n441XdgsF7AYXR/NHkDD20MdTAxEv4gOFdNpw6guqw4=
-github.com/elastic/elastic-agent-libs v0.22.1/go.mod h1:xSeIP3NtOIT4N2pPS4EyURmS1Q8mK0lWZ8Wd1Du6q3w=
+github.com/elastic/elastic-agent-libs v0.21.5 h1:YTMwaBPgOPvQnxBPv7fLpUqjw2HgY3ymC9TwdzdOD8U=
+github.com/elastic/elastic-agent-libs v0.21.5/go.mod h1:xSeIP3NtOIT4N2pPS4EyURmS1Q8mK0lWZ8Wd1Du6q3w=
 github.com/elastic/elastic-agent-system-metrics v0.11.11 h1:Qjh3Zef23PfGlG91AF+9ciNLNQf/8cDJ4CalnLZtV3g=
 github.com/elastic/elastic-agent-system-metrics v0.11.11/go.mod h1:GNqmKfvOt8PwORjbS6GllNdMfkLpOWyTa7P8oQq4E5o=
 github.com/elastic/elastic-transport-go/v8 v8.7.0 h1:OgTneVuXP2uip4BA658Xi6Hfw+PeIOod2rY3GVMGoVE=