az ml online-endpoint create / online-deployment create fails if it already exists

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**Related command**
az ml online-endpoint create ...
az ml online-deployment create ...

**Describe the bug**
Command fails (and with it, corresponding Tasks in AzureDevops Pipelines) despite the documentation stating:

[online-endpoint] To create an endpoint, provide a YAML file with batch endpoint configuration. If the endpoint already exists, it will be over-written with the new settings.
[online-deployment] Create a deployment. If the deployment already exists, it will be over-written with the new settings.

This is extremely annoying, because it forces you to include a separate check and an if/else construct for create/update when trying to automate.

**To Reproduce**
create the same endpoint/deployment twice in a row
az ml online-endpoint create -w -g -n dummy-endpoint
az ml online-endpoint create -w -g -n dummy-endpoint
=> cli.azure.cli.core.azclierror: Met error :Endpoint already exists

**Expected behavior**
I expect the command to overwrite the existing endpoint (with potentially new settings) if it already exists (as would be the intended behavior according to the documentation)

**Environment summary**
Cloudshell bash in azure portal
azure-cli 2.39.0
core 2.39.0
telemetry 1.0.6 *
Extensions:
ml 2.6.1
ai-examples 0.2.5
ssh 1.1.2

Dependencies:
msal 1.18.0b1
azure-mgmt-resource 21.1.0b1