[scim2-sdk-server] SearchRequest and DotSearchFilter not working together nicely

[andreim11]

Given that DotSearchFilter converts POST /Users/.search into GET /Users with query params, the obvious approach is to only handle the GET endpoint. Problem is that I found no way of getting access to a SearchRequest model built from the query params. If I handle just the POST /Users/.search, it works out nicely mapping the json body to a SearchRequest model, however this does not work out well when filters are specified as query params