Merge #4731

4731: Fix the missing geo distance when one or both of the lat / lng are string r=irevoire a=irevoire

# Pull Request

## Related issue
Fixes https://github.com/meilisearch/meilisearch/issues/4193

## What does this PR do?
- Properly extract the lat / lng when one or both of them are string
- Add a test 


Co-authored-by: Tamo <tamo@meilisearch.com>

meilisearch/tests/search/geo.rs

@@ -150,7 +150,8 @@ async fn bug_4640() {
                       "_geo": {
                         "lat": "45.4777599",
                         "lng": "9.1967508"
-                      }
+                      },
+                      "_geoDistance": 0
                     },
                     {
                       "id": 1,