improve init performance

[ms-henglu]

Previously the extension loads all the type definition during initialization, and this is used to differentiate between the read only types and normal resource types. But this could be really time-consuming, so this PR disables this feature to improve the performance.

Now the initialization only takes 100ms to finish, previously it was 33s.

[mybayern1974]

Would this change bring the impact that at the client editor side, the content auto-complete feature would show hints for read-only properties? If so, those shown info would be less meaningful to users given those props are not configurable?

[ms-henglu]

Would this change bring the impact that at the client editor side, the content auto-complete feature would show hints for read-only properties? If so, those shown info would be less meaningful to users given those props are not configurable?

@mybayern1974 - No. But when user inputs the value for type in the azapi_resource resource block, the auto-completion will show all resource types including the readonly ones. Comparing with the slow initialization, the impact is acceptable.