Fix default beat name to elastic-agent instead of the repo directory name (#4774)

* Fix default beat name to elastic-agent instead of the repo directory name

Co-authored-by: Craig MacKenzie <craig.mackenzie@elastic.co>

---------

Co-authored-by: Craig MacKenzie <craig.mackenzie@elastic.co>

Author: pchila

dev-tools/mage/settings.go

@@ -41,6 +41,8 @@ const (
 
 	elasticAgentModulePath = "github.com/elastic/elastic-agent"
 
+	defaultName = "elastic-agent"
+
 	// Env vars
 	// agent package version
 	agentPackageVersionEnvVar = "AGENT_PACKAGE_VERSION"
@@ -73,7 +75,7 @@ var (
 	// the crossbuild images at /go/pkg/mod, read-only,  when set to true.
 	CrossBuildMountModcache = true
 
-	BeatName        = EnvOr("BEAT_NAME", filepath.Base(CWD()))
+	BeatName        = EnvOr("BEAT_NAME", defaultName)
 	BeatServiceName = EnvOr("BEAT_SERVICE_NAME", BeatName)
 	BeatIndexPrefix = EnvOr("BEAT_INDEX_PREFIX", BeatName)
 	BeatDescription = EnvOr("BEAT_DESCRIPTION", "")