Add parameter for encoded custom configuration

Author: alyssa1303

src/aks-preview/azext_aks_preview/_params.py

@@ -967,6 +967,7 @@ def load_arguments(self, _):
         # virtual machines
         c.argument("vm_sizes", is_preview=True)
         c.argument("enable_imds_restriction", action="store_true", is_preview=True)
+        c.argument("encoded_custom_configuration", is_preview=True)
 
     with self.argument_context("aks update") as c:
         # managed cluster paramerters

src/aks-preview/azext_aks_preview/custom.py

@@ -544,6 +544,8 @@ def aks_create(
     vm_sizes=None,
     # IMDS restriction
     enable_imds_restriction=False,
+    # Encoded Custom Configuration
+    encoded_custom_configuration=None,
 ):
     # DO NOT MOVE: get all the original parameters and save them as a dictionary
     raw_parameters = locals()

src/aks-preview/linter_exclusions.yml

@@ -93,6 +93,9 @@ aks create:
     disable_acns_observability:
       rule_exclusions:  
         - option_length_too_long
+    encoded_custom_configuration:
+      rule_exclusions:
+        - option_length_too_long
 aks update:
   parameters:
     enable_pod_identity_with_kubenet: