use iota and camel case for constants

Co-authored-by: Liam Cervante <[email protected]>

internal/providers/provider.go

@@ -243,15 +243,19 @@ type ReadResourceRequest struct {
 	DeferralAllowed bool
 }
 
+
+type DeferredReason int32
+
 const (
-	DEFERRED_REASON_UNKNOWN                 = 0
-	DEFERRED_REASON_RESOURCE_CONFIG_UNKNOWN = 1
-	DEFERRED_REASON_PROVIDER_CONFIG_UNKNOWN = 2
-	DEFERRED_REASON_ABSENT_PREREQ           = 3
+	DeferredReasonUnknown DeferredReason = iota
+	DeferredReasonResourceConfigUnknown
+	DeferredReasonProviderConfigUnknown
+	DeferredReasonResourceConfigUnknown
+	DeferredReasonAbsentPrereq
 )
 
 type Deferred struct {
-	Reason int32
+	Reason DeferredReason
 }
 
 type ReadResourceResponse struct {