chore: support multiple key:value search query params (#12690)

This more closely aligns with GitHub's label search style. Actual search params need to be converted to allow this format, by default they will throw an error if they do not support listing.

coderd/searchquery/search.go

@@ -163,17 +163,6 @@ func searchTerms(query string, defaultKey func(term string, values url.Values) e
 		}
 	}
 
-	for k := range searchValues {
-		if len(searchValues[k]) > 1 {
-			return nil, []codersdk.ValidationError{
-				{
-					Field:  "q",
-					Detail: fmt.Sprintf("Query parameter %q provided more than once, found %d times", k, len(searchValues[k])),
-				},
-			}
-		}
-	}
-
 	return searchValues, nil
 }