Custom Properties Enum API accepts any value

[Prajwal214]

Affected module
Does it impact the UI, backend or Ingestion Framework?
-- Backend

Describe the bug
A clear and concise description of what the bug is.
-- Using the API for update custom properties enum does not any check before add values, it response correct when wrong values are introduced.

For example my custom porperty:
testAutomationHubMultiselect
["multiselectFirst","multiselectSecond"]
Multi Select: No

My custom property is not multiselect and it is supposed just to accept 2 specific values, however as you can see in the attached images can be update throw the API any value and any amount of value that can manage it.

To Reproduce

Screenshots or steps to reproduce

Expected behavior
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Version:

• OS: [e.g. iOS]
• Python version:
• OpenMetadata version: [e.g. 0.8] OM v1.5.11
• OpenMetadata Ingestion package version: [e.g. openmetadata-ingestion[docker]==XYZ]

Additional context
Add any other context about the problem here.