chore: still keep ctx in git.Repository struct for cat-file batch command (#38684)

Unfortunately, we can't completely remove the ctx from git.Repository,
because the CatFileBatch still heavily depends on a parent context.

If we remove the Repository ctx, the CatFileBatch will become a mess and
create a lot of unnecessary git processes.

http://localhost:3000/-/admin/monitor/perftrace

* Before: open a repo home, dozens of git processes (duplicate cat-file)
* After: only a few (no duplicate cat-file)

modules/util/runtime.go

@@ -3,7 +3,10 @@
 
 package util
 
-import "runtime"
+import (
+	"runtime"
+	"strings"
+)
 
 const isOSWindows = runtime.GOOS == "windows"
 
@@ -15,5 +18,9 @@ func CallerFuncName(optSkipParent ...int) string {
 	}
 	runtime.Callers(skipParent+1 /*this*/ +1 /*runtime*/, pc)
 	funcName := runtime.FuncForPC(pc[0]).Name()
+	if pos := strings.LastIndex(funcName, "/"); pos >= 0 {
+		// only keep the last package name and func name
+		funcName = funcName[pos+1:]
+	}
 	return funcName
 }

modules/util/runtime_test.go

@@ -12,7 +12,7 @@ import (
 
 func TestCallerFuncName(t *testing.T) {
 	s := CallerFuncName()
-	assert.Equal(t, "gitea.dev/modules/util.TestCallerFuncName", s)
+	assert.Equal(t, "util.TestCallerFuncName", s)
 }
 
 func BenchmarkCallerFuncName(b *testing.B) {