[Gitlab.Groups] options should be optional for `share` and `unshare` operations

**Description** - Node.js version: `24.13.0` - Gitbeaker version: `43.8.0` - Gitbeaker release (cli, rest, core, requester-utils): rest - OS & version: WSL / Ubuntu 22 For most REST API methods, the options argument is optional. But it's not the case for `share` and `unshare` operations on `Groups`. **Steps to reproduce** ```javascript const client = new Gitlab(...); client.Groups.share(group.id, groupToShare.id, AccessLevel.GUEST); client.Groups.unshare(group.id, groupToShare.id); ``` **Expected behaviour** No compilation error. **Actual behaviour** ```plain Expected 4 arguments, but got 3. index.d.ts(751, 117): An argument for 'options' was not provided. (method) Groups<false>.share<false>(groupId: string | number, sharedGroupId: string | number, groupAccess: number, options: { expiresAt?: string; } & Sudo & ShowExpanded<false>): Promise<...> ``` ```plain Expected 3 arguments, but got 2. index.d.ts(759, 98): An argument for 'options' was not provided. (method) Groups<false>.unshare<false>(groupId: string | number, sharedGroupId: string | number, options: Sudo & ShowExpanded<false>): Promise<void> ``` **Possible fixes** Make `options` argument optional like for all other methods. **Checklist** - [x] I have checked that this is not a duplicate issue. - [x] I have read the documentation.