Renderer: Add sanitize API (#50936)

* svg fun

* #50597: add proto

* #50597: add sanitizer methods

* #50597: add provider

* #50597: use sanitizer

* #50597: use sanitizer

* update grafana to match new api

* add comments

* add capability check

* add timing

* update sanitize path

* improve log message

* strings.HasPrefix rather than filepath.IsAbs

* filepath.Clean + filepath.ToSlash for windows

* read 404

* remove `path.clean` from `getPathAndScope`

* add resp body close

* remove unneeded prop

* Update pkg/services/rendering/rendering.go

Co-authored-by: Agnès Toulet <35176601+AgnesToulet@users.noreply.github.com>

* remove test files

* filepath.ToSlash correct wrapping

* filepath.ToSlash correct wrapping

* filepath.ToSlash comment

* compilation error

* lint fix

* fix error message

* Update pkg/services/rendering/rendering.go

Co-authored-by: Agnès Toulet <35176601+AgnesToulet@users.noreply.github.com>

* add `image/svg+xml` mime type

* refactored log

* refactored log

Co-authored-by: Agnès Toulet <35176601+AgnesToulet@users.noreply.github.com>

pkg/services/store/validate.go

@@ -13,6 +13,7 @@ var (
 	allowedImageExtensions = map[string]bool{
 		".jpg":  true,
 		".jpeg": true,
+		".svg":  true,
 		".gif":  true,
 		".png":  true,
 		".webp": true,
@@ -23,6 +24,7 @@ var (
 		".gif":  {"image/gif": true},
 		".png":  {"image/png": true},
 		".webp": {"image/webp": true},
+		".svg":  {"text/xml; charset=utf-8": true, "text/plain; charset=utf-8": true, "image/svg+xml": true},
 	}
 )
 
@@ -68,7 +70,7 @@ func (s *standardStorageService) validateUploadRequest(ctx context.Context, user
 	// TODO: validateProperties
 
 	if err := filestorage.ValidatePath(storagePath); err != nil {
-		return fail("path validation failed: " + err.Error())
+		return fail("path validation failed. error:" + err.Error() + ". path: " + storagePath)
 	}
 
 	switch req.EntityType {