Uniform all temporary directories and allow customizing temp path (#32352)

This PR uniform all temporary directory usage so that it will be easier
to manage.

Relate to #31792 

- [x] Added a new setting to allow users to configure the global
temporary directory.
- [x] Move all temporary files and directories to be placed under
os.Temp()/gitea.
- [x] `setting.Repository.Local.LocalCopyPath` now will be
`setting.TempPath/local-repo` and the customized path is removed.
```diff
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;[repository.local]
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-;;
-;; Path for local repository copy. Defaults to  TEMP_PATH + `local-repo`, this is deprecated and cannot be changed
-;LOCAL_COPY_PATH = local-repo
```

- [x] `setting.Repository.Upload.TempPath` now will be
`settting.TempPath/uploads` and the customized path is removed.
```diff
;[repository.upload]
-;;
-;; Path for uploads. Defaults to TEMP_PATH + `uploads`
-;TEMP_PATH = uploads
```

- [x] `setting.Packages.ChunkedUploadPath` now will be
`settting.TempPath/package-upload` and the customized path is removed.
```diff
;[packages]
-;;
-;; Path for chunked uploads. Defaults it's `package-upload` under `TEMP_PATH` unless it's an absolute path.
-;CHUNKED_UPLOAD_PATH = package-upload
```

- [x] `setting.SSH.KeyTestPath` now will be
`settting.TempPath/ssh_key_test` and the customized path is removed.
```diff
[server]
-;;
-;; Directory to create temporary files in when testing public keys using ssh-keygen,
-;; default is the system temporary directory.
-;SSH_KEY_TEST_PATH =
```

TODO:
- [ ] setting.PprofDataPath haven't been changed because it may need to
be kept until somebody read it but temp path may be clean up any time.

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

modules/repository/temp.go

@@ -4,41 +4,19 @@
 package repository
 
 import (
+	"context"
 	"fmt"
-	"os"
-	"path/filepath"
 
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
-	"code.gitea.io/gitea/modules/util"
 )
 
-// LocalCopyPath returns the local repository temporary copy path.
-func LocalCopyPath() string {
-	if filepath.IsAbs(setting.Repository.Local.LocalCopyPath) {
-		return setting.Repository.Local.LocalCopyPath
-	}
-	return filepath.Join(setting.AppDataPath, setting.Repository.Local.LocalCopyPath)
-}
-
 // CreateTemporaryPath creates a temporary path
-func CreateTemporaryPath(prefix string) (string, error) {
-	if err := os.MkdirAll(LocalCopyPath(), os.ModePerm); err != nil {
-		log.Error("Unable to create localcopypath directory: %s (%v)", LocalCopyPath(), err)
-		return "", fmt.Errorf("Failed to create localcopypath directory %s: %w", LocalCopyPath(), err)
-	}
-	basePath, err := os.MkdirTemp(LocalCopyPath(), prefix+".git")
+func CreateTemporaryPath(prefix string) (string, context.CancelFunc, error) {
+	basePath, cleanup, err := setting.AppDataTempDir("local-repo").MkdirTempRandom(prefix + ".git")
 	if err != nil {
 		log.Error("Unable to create temporary directory: %s-*.git (%v)", prefix, err)
-		return "", fmt.Errorf("Failed to create dir %s-*.git: %w", prefix, err)
+		return "", nil, fmt.Errorf("failed to create dir %s-*.git: %w", prefix, err)
 	}
-	return basePath, nil
-}
-
-// RemoveTemporaryPath removes the temporary path
-func RemoveTemporaryPath(basePath string) error {
-	if _, err := os.Stat(basePath); !os.IsNotExist(err) {
-		return util.RemoveAll(basePath)
-	}
-	return nil
+	return basePath, cleanup, nil
 }