xds: Remove xds authority label from metric registration (#11760)

xds: Remove xds authority label from metric registration (#11760) · grpc/grpc-java@6516c73

Original file line number	Diff line number	Diff line change
`@@ -90,7 +90,7 @@ final class XdsClientMetricReporterImpl implements XdsClientMetricReporter {`
`90`	`90`	`Arrays.asList("grpc.target", "grpc.xds.server"), Collections.emptyList(), false);`
`91`	`91`	`RESOURCES_GAUGE = metricInstrumentRegistry.registerLongGauge("grpc.xds_client.resources",`
`92`	`92`	`"EXPERIMENTAL. Number of xDS resources.", "{resource}",`
`93`		`-Arrays.asList("grpc.target", "grpc.xds.authority", "grpc.xds.cache_state",`
	`93`	`+Arrays.asList("grpc.target", "grpc.xds.cache_state",`
`94`	`94`	`"grpc.xds.resource_type"), Collections.emptyList(), false);`
`95`	`95`	`}`
`96`	`96`