feat: add scim v2 service provider configuration endpoints (#9258)

# Which Problems Are Solved
* Adds support for the service provider configuration SCIM v2 endpoints

# How the Problems Are Solved
* Adds support for the service provider configuration SCIM v2 endpoints
  * `GET /scim/v2/{orgId}/ServiceProviderConfig`
  * `GET /scim/v2/{orgId}/ResourceTypes`
  * `GET /scim/v2/{orgId}/ResourceTypes/{name}`
  * `GET /scim/v2/{orgId}/Schemas`
  * `GET /scim/v2/{orgId}/Schemas/{id}`

# Additional Context
Part of #8140

Co-authored-by: Stefan Benz <46600784+stebenz@users.noreply.github.com>

internal/api/scim/schemas/string.go

@@ -7,11 +7,6 @@ import "encoding/json"
 // This increases security to really ensure this is never sent to a client.
 type WriteOnlyString string
 
-func NewWriteOnlyString(s string) *WriteOnlyString {
-	wos := WriteOnlyString(s)
-	return &wos
-}
-
 func (s *WriteOnlyString) MarshalJSON() ([]byte, error) {
 	return []byte("null"), nil
 }