Component Parameters don't accept Value Type as `datetime` but `calendar` and is not matching as per documentation

Issue:

While creating component with params via Site Management apis, it's not clear per this document what valueType are allowed in Parameter.

https://documentation.bloomreach.com/api-reference/content/management/site-management-api/schemas.html#ParameterType

When tried with 'datetime' as suggested in https://documentation.bloomreach.com/developers/content/components/define-configuration-parameters-for-dynamic-components.html --> Add Component Parameters --> Required Properties --> valueType ,

the api is failing with message like `HV000028: Unexpected exception during isValid call. ` when put default value = "" or a valid value like "defaultValue": "2007-12-03T00:00:00.00Z"

or with message 'ComponentDefinition.parameters[0].valueType: must not be null' when put defaultValue = null or is omitted

But when tried with `calendar` type and null value or missing defaultValue, it works.

So I assume we need to update our documentation.

Expected:

1. we need to clearly provide which valueTypes are available in the schemas doc
2. need to update the site config doc with correct type accordingly
3. fix api if needed