Add commit status summary table to reduce query from commit status table (#30223)

This PR adds a new table named commit status summary to reduce queries
from the commit status table. After this change, commit status summary
table will be used for the final result, commit status table will be for
details.

---------

Co-authored-by: Jason Song <i@wolfogre.com>

tests/integration/pull_status_test.go

@@ -12,6 +12,9 @@ import (
 	"testing"
 
 	auth_model "code.gitea.io/gitea/models/auth"
+	git_model "code.gitea.io/gitea/models/git"
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/models/unittest"
 	api "code.gitea.io/gitea/modules/structs"
 
 	"github.com/stretchr/testify/assert"
@@ -90,6 +93,10 @@ func TestPullCreate_CommitStatus(t *testing.T) {
 			assert.True(t, ok)
 			assert.Contains(t, cls, statesIcons[status])
 		}
+
+		repo1 := unittest.AssertExistsAndLoadBean(t, &repo_model.Repository{OwnerName: "user1", Name: "repo1"})
+		css := unittest.AssertExistsAndLoadBean(t, &git_model.CommitStatusSummary{RepoID: repo1.ID, SHA: commitID})
+		assert.EqualValues(t, api.CommitStatusWarning, css.State)
 	})
 }