v8.0 module release (#22975)

https://mattermost.atlassian.net/browse/MM-52079

```release-note
We upgrade the module version to 8.0. The new module path is github.com/mattermost-server/server/v8.
```


Co-authored-by: Doug Lauder <wiggin77@warpmail.net>

server/plugin/stringifier.go

@@ -0,0 +1,31 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+package plugin
+
+import (
+	"fmt"
+)
+
+func stringify(objects []any) []string {
+	stringified := make([]string, len(objects))
+	for i, object := range objects {
+		stringified[i] = fmt.Sprintf("%+v", object)
+	}
+	return stringified
+}
+
+func toObjects(strings []string) []any {
+	if strings == nil {
+		return nil
+	}
+	objects := make([]any, len(strings))
+	for i, string := range strings {
+		objects[i] = string
+	}
+	return objects
+}
+
+func stringifyToObjects(objects []any) []any {
+	return toObjects(stringify(objects))
+}