[docs] fix deps call in dbt_definitions_with_downstream (#25462)

missed this in `AssetKey` change to disallow iteration 

also fixes up issues from
#24265

## How I Tested These Changes

pytest
examples/docs_beta_snippets/docs_beta_snippets_tests/test_all_files_load.py

examples/docs_beta_snippets/docs_beta_snippets/dagster-plus/deployment/hybrid/agents/kubernetes/resource_request_pipes.py

@@ -1,7 +1,9 @@
-import dagster as dg
 from dagster_k8s import PipesK8sClient
 
-@dg.gasset
+import dagster as dg
+
+
+@dg.asset
 def k8s_pod_asset(
     context: dg.AssetExecutionContext,
     pipes_k8s_client: PipesK8sClient,

examples/docs_beta_snippets/docs_beta_snippets/guides/etl/transform-dbt/dbt_definitions_with_downstream.py

@@ -16,7 +16,6 @@ def raw_customers(context: dg.AssetExecutionContext) -> None:
 
     # Create a schema named raw
     connection.execute("create schema if not exists raw")
-
     # Create/replace table named raw_customers
     connection.execute(
         "create or replace table raw.raw_customers as select * from data"
@@ -42,7 +41,7 @@ def dbt_models(context: dg.AssetExecutionContext, dbt: DbtCliResource):
     compute_kind="python",
     # Defines the dependency on the customers model,
     # which is represented as an asset in Dagster
-    deps=get_asset_key_for_model([dbt_models], "customers"),
+    deps=[get_asset_key_for_model([dbt_models], "customers")],
 )
 # highlight-end
 def customer_histogram(context: dg.AssetExecutionContext):

examples/docs_beta_snippets/docs_beta_snippets/guides/etl/transform-dbt/dbt_definitions_with_schedule.py

@@ -49,7 +49,7 @@ def dbt_models(context: dg.AssetExecutionContext, dbt: DbtCliResource):
     compute_kind="python",
     # Defines the dependency on the customers model,
     # which is represented as an asset in Dagster
-    deps=get_asset_key_for_model([dbt_models], "customers"),
+    deps=[get_asset_key_for_model([dbt_models], "customers")],
 )
 def customer_histogram(context: dg.AssetExecutionContext):
     # Read the contents of the customers table into a Pandas DataFrame

examples/docs_beta_snippets/tox.ini

@@ -26,6 +26,7 @@ deps =
   -e ../../python_modules/libraries/dagster-gcp
   -e ../../python_modules/libraries/dagster-dbt
   -e ../../python_modules/libraries/dagster-pandas
+  -e ../../python_modules/libraries/dagster-k8s
   integrations: -e ../../python_modules/libraries/dagster-databricks
   integrations: -e ../../python_modules/libraries/dagster-postgres
   integrations: -e ../../python_modules/libraries/dagster-fivetran