refactor: use modernc sqlite driver as default (#37562)

The mattn driver is still kept, can be enabled by
TAGS="sqlite_mattn sqlite_unlock_notify"

---------

Co-authored-by: TheFox0x7 <thefox0x7@gmail.com>

models/issues/issue_test.go

@@ -17,6 +17,7 @@ import (
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/modules/test"
 
 	"github.com/stretchr/testify/assert"
 	"xorm.io/builder"
@@ -297,14 +298,11 @@ func TestIssue_ResolveMentions(t *testing.T) {
 
 func TestResourceIndex(t *testing.T) {
 	assert.NoError(t, unittest.PrepareTestDatabase())
-
 	var wg sync.WaitGroup
-	for i := range 100 {
-		wg.Add(1)
-		go func(i int) {
+	for i := range 25 {
+		wg.Go(func() {
 			testInsertIssue(t, fmt.Sprintf("issue %d", i+1), "my issue", 0)
-			wg.Done()
-		}(i)
+		})
 	}
 	wg.Wait()
 }
@@ -317,18 +315,12 @@ func TestCorrectIssueStats(t *testing.T) {
 	// maxQueryParameters + 10 issues into the testDatabase.
 	// Each new issues will have a constant description "Bugs are nasty"
 	// Which will be used later on.
-
+	defer test.MockVariableValue(&issues_model.MaxQueryParameters, 25)()
 	issueAmount := issues_model.MaxQueryParameters + 10
 
-	var wg sync.WaitGroup
 	for i := range issueAmount {
-		wg.Add(1)
-		go func(i int) {
-			testInsertIssue(t, fmt.Sprintf("Issue %d", i+1), "Bugs are nasty", 0)
-			wg.Done()
-		}(i)
+		testInsertIssue(t, fmt.Sprintf("Issue %d", i+1), "Bugs are nasty", 0)
 	}
-	wg.Wait()
 
 	// Now we will get all issueID's that match the "Bugs are nasty" query.
 	issues, err := issues_model.Issues(t.Context(), &issues_model.IssuesOptions{