mark apm_resource_stats query is deprecated (DataDog#3317)

Co-authored-by: ci.datadog-api-spec <packages@datadoghq.com>

Author: api-clients-generation-pipeline[bot]

.generator/schemas/v1/openapi.yaml

@@ -3006,7 +3006,8 @@ components:
       x-enum-varnames:
         - APM_RESOURCE_STATS
     FormulaAndFunctionApmResourceStatsQueryDefinition:
-      description: APM resource stats query using formulas and functions.
+      deprecated: true
+      description: APM resource stats query using formulas and functions. Deprecated - Use `apm_metrics` query type instead.
       properties:
         cross_org_uuids:
           $ref: "#/components/schemas/CrossOrgUuids"

lib/datadog_api_client/v1/models/formula_and_function_apm_resource_stats_query_definition.rb

@@ -17,7 +17,9 @@
 require 'time'
 
 module DatadogAPIClient::V1
-  # APM resource stats query using formulas and functions.
+  # APM resource stats query using formulas and functions. Deprecated - Use `apm_metrics` query type instead.
+  #
+  # @deprecated This model is deprecated.
   class FormulaAndFunctionApmResourceStatsQueryDefinition
     include BaseGenericModel
 
@@ -96,6 +98,7 @@ def self.openapi_types
     # @param attributes [Hash] Model attributes in the form of hash
     # @!visibility private
     def initialize(attributes = {})
+      warn "[DEPRECATION] `FormulaAndFunctionApmResourceStatsQueryDefinition` is deprecated."
       if (!attributes.is_a?(Hash))
         fail ArgumentError, "The input argument (attributes) must be a hash in `DatadogAPIClient::V1::FormulaAndFunctionApmResourceStatsQueryDefinition` initialize method"
       end