fix: add revive linter exception for var-naming in cache-cli metrics package

Author: dexyk

cache-cli/pkg/metrics/context.go

@@ -1,3 +1,4 @@
+//revive:disable-next-line:var-naming
 package metrics
 
 import (

cache-cli/pkg/metrics/local.go

@@ -1,3 +1,4 @@
+//revive:disable-next-line:var-naming
 package metrics
 
 import (

cache-cli/pkg/metrics/metrics.go

@@ -1,3 +1,4 @@
+//revive:disable-next-line:var-naming
 package metrics
 
 import (

cache-cli/pkg/metrics/no_op.go

@@ -1,3 +1,4 @@
+//revive:disable-next-line:var-naming
 package metrics
 
 type NoOpMetricsManager struct {