Genericise sliceutil functions (#4253)

* Genericise sliceutil.SliceSame
* Genericise intslice functions
* Genericise stringutil functions

pkg/sqlite/image.go

@@ -9,7 +9,7 @@ import (
 
 	"github.com/jmoiron/sqlx"
 	"github.com/stashapp/stash/pkg/models"
-	"github.com/stashapp/stash/pkg/sliceutil/intslice"
+	"github.com/stashapp/stash/pkg/sliceutil"
 	"gopkg.in/guregu/null.v4"
 	"gopkg.in/guregu/null.v4/zero"
 
@@ -323,7 +323,7 @@ func (qb *ImageStore) FindMany(ctx context.Context, ids []int) ([]*models.Image,
 		}
 
 		for _, s := range unsorted {
-			i := intslice.IntIndex(ids, s.ID)
+			i := sliceutil.Index(ids, s.ID)
 			images[i] = s
 		}