[chore] Set missing enabled field for resource_attributes (#43085)

If `enabled` is unset in metadata.yaml defaults to false. This commit
doesn't change any behavior, it only unblocks the stricter validation
open-telemetry/opentelemetry-collector#13921 by
setting the false value explicitly.

Likely the enabled fields are missed by mistake here. If so, they should
be explicitly fixed separately, cc (code owners of the effected
components) @nslaughter, @celian-garcia, @ishleenk17, @Caleb-Hurshman,
@mrsillydog.

Author: dmitryax

receiver/apachesparkreceiver/metadata.yaml

@@ -24,6 +24,7 @@ resource_attributes:
   spark.stage.attempt.id:
     description: The ID of the stage attempt for which the metric was recorded.
     type: int
+    enabled: false
   spark.executor.id:
     description: The ID of the executor for which the metric was recorded.
     type: string

receiver/azuremonitorreceiver/metadata.yaml

@@ -12,12 +12,15 @@ resource_attributes:
   azuremonitor.tenant_id:
     description: Azure tenant ID
     type: string
+    enabled: false
   azuremonitor.subscription_id:
     description: Azure subscription ID
     type: string
+    enabled: false
   azuremonitor.subscription:
     description: Azure subscription name
     type: string
+    enabled: false
 
 tests:
   config:

receiver/sshcheckreceiver/metadata.yaml

@@ -12,6 +12,7 @@ resource_attributes:
   ssh.endpoint:
     description: Full SSH endpoint
     type: string
+    enabled: false
 
 attributes:
   error.message: