chore: fix naming problem (#2500)

When I was looking for how to mock mongo client, I found some naming problems and wanted to fix them.

core/stores/mon/collection_test.go

@@ -204,7 +204,7 @@ func TestCollection_EstimatedDocumentCount(t *testing.T) {
 	})
 }
 
-func TestCollectionFind(t *testing.T) {
+func TestCollection_Find(t *testing.T) {
 	mt := mtest.New(t, mtest.NewOptions().ClientType(mtest.Mock))
 	defer mt.Close()
 
@@ -252,7 +252,7 @@ func TestCollectionFind(t *testing.T) {
 	})
 }
 
-func TestCollectionFindOne(t *testing.T) {
+func TestCollection_FindOne(t *testing.T) {
 	mt := mtest.New(t, mtest.NewOptions().ClientType(mtest.Mock))
 	defer mt.Close()
 
@@ -436,7 +436,7 @@ func TestCollection_InsertMany(t *testing.T) {
 	})
 }
 
-func TestCollection_Remove(t *testing.T) {
+func TestCollection_DeleteOne(t *testing.T) {
 	mt := mtest.New(t, mtest.NewOptions().ClientType(mtest.Mock))
 	defer mt.Close()
 
@@ -456,7 +456,7 @@ func TestCollection_Remove(t *testing.T) {
 	})
 }
 
-func TestCollectionRemoveAll(t *testing.T) {
+func TestCollection_DeleteMany(t *testing.T) {
 	mt := mtest.New(t, mtest.NewOptions().ClientType(mtest.Mock))
 	defer mt.Close()
 
@@ -565,7 +565,7 @@ func TestCollection_UpdateMany(t *testing.T) {
 	})
 }
 
-func Test_DecoratedCollectionLogDuration(t *testing.T) {
+func TestDecoratedCollection_LogDuration(t *testing.T) {
 	mt := mtest.New(t, mtest.NewOptions().ClientType(mtest.Mock))
 	defer mt.Close()
 	c := decoratedCollection{