Fix missing defer prepareTestEnv(t)() on some tests (#9906)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: zeripath <art27@cantab.net>

integrations/attachment_test.go

@@ -58,13 +58,13 @@ func createAttachment(t *testing.T, session *TestSession, repoURL, filename stri
 }
 
 func TestCreateAnonymousAttachment(t *testing.T) {
-	prepareTestEnv(t)
+	defer prepareTestEnv(t)()
 	session := emptyTestSession(t)
 	createAttachment(t, session, "user2/repo1", "image.png", generateImg(), http.StatusFound)
 }
 
 func TestCreateIssueAttachment(t *testing.T) {
-	prepareTestEnv(t)
+	defer prepareTestEnv(t)()
 	const repoURL = "user2/repo1"
 	session := loginUser(t, "user2")
 	uuid := createAttachment(t, session, repoURL, "image.png", generateImg(), http.StatusOK)
@@ -93,7 +93,7 @@ func TestCreateIssueAttachment(t *testing.T) {
 }
 
 func TestGetAttachment(t *testing.T) {
-	prepareTestEnv(t)
+	defer prepareTestEnv(t)()
 	adminSession := loginUser(t, "user1")
 	user2Session := loginUser(t, "user2")
 	user8Session := loginUser(t, "user8")