reset kubeconfig to empty string when using in-cluster config (open-telemetry#2273)

Author: changexd

.chloggen/fix-TA-kubeconfig.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. operator, target allocator, github action)
+component: target allocator
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: reset kubeconfig to empty string when using in-cluster config
+
+# One or more tracking issues related to the change
+issues: [2262]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: ""

cmd/otel-allocator/config/config.go

@@ -96,6 +96,7 @@ func LoadFromCLI(target *Config, flagSet *pflag.FlagSet) error {
 		if err != nil {
 			return err
 		}
+		target.KubeConfigFilePath = ""
 	}
 	target.ClusterConfig = clusterConfig