fix: Fixed cluster::guild_create, cluster::stage_instance_create and cluster::sticker_packs_get returning 404 Not Found

[Commandserver]

• My pull request is made against the dev branch.
• I have ensured that the changed library can be built on your target system. I did not introduce any platform-specific code.
• I have ensured that all methods and functions are fully documented using doxygen style comments.
• I tested my commits, by adding a test case to the unit tests if needed
• I have ensured that I did not break any existing API calls.
• My code follows the coding style guide (if you are not sure, match the code style of existing files including indent style etc).
• I have not built my pull request using AI, a static analysis tool or similar without any human oversight. Where I have generated this pull request using a tool, I have justified why this is needed.

The post_rest methods did append a / when no major_parameters was passed. This affected cluster::guild_create, cluster::stage_instance_create and cluster::sticker_packs_get to return 404 Not found because the path was wrong with the appended slash!

The cluster::sticker_packs_get method needed an extra fix too.

[netlify]

✅ Deploy Preview for dpp-dev ready!

Name	Link
🔨 Latest commit	7c98ac8
🔍 Latest deploy log	https://app.netlify.com/sites/dpp-dev/deploys/64e9f9fb1519ac0008ba09ae
😎 Deploy Preview	https://deploy-preview-809--dpp-dev.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[Mishura4]

You also haven't checked "I have ensured that I did not break any existing API calls." in the PR checklist, I'm assuming you're testing it now? I'll approve it when you check it

[Commandserver]

You also haven't checked "I have ensured that I did not break any existing API calls." in the PR checklist, I'm assuming you're testing it now? I'll approve it when you check it

tbh i would have to test almost all cluster methods to make sure nothing breaks. I won't do that lol. i can test a few manually if you want. i thought the unit tests cover some cluster methods and that may be enough 🤷.

[Mishura4]

Yeah as long as you ran the unit tests and checked the ones you've changed that's fine I think!

[Mishura4]

(Just make sure you do check the box to make openssf and the other things happy hehe)

[Commandserver]

Yeah as long as you ran the unit tests and checked the ones you've changed that's fine I think!

The ones this pr fixes aren't covered by the unit tests iirc. But i tested them manually of course.

[Commandserver]

(Just make sure you do check the box to make openssf and the other things happy hehe)

okay 😎