DRIVERS-2883 Disable OIDC Azure Functions test and add note (#718)

Author: blink1073

.evergreen/auth_oidc/azure_func/README.md

@@ -4,6 +4,13 @@ Scripts to handle testing an OIDC on Azure Functions.
 
 https://learn.microsoft.com/en-us/azure/azure-functions/
 
+## Note (12/15/2025)
+
+The existing Azure function has expired, so we have disabled the test in `config.yml`.
+The instructions for creating a new Azure function have changed slightly.
+We will need to follow the instructions at the link above and update the Overall
+prerequisites below in order to revive DRIVERS-2883.
+
 ## Prerequisites
 
 ### Overall

.evergreen/config.yml

@@ -1490,7 +1490,7 @@ buildvariants:
     - "test-oidc-docker"
     - "testgcpoidc_task_group"
     - "testazureoidc_task_group"
-    - "test_oidc_azure_func_task_group"
+    # - "test_oidc_azure_func_task_group"
     - "test_oidc_k8s_atlas_task_group"
     - "test_oidc_k8s_local_task_group"