ci: disable scheduled jobs in forked repo

[warjiang]

TLDR

there is no need to run all ci tasks as the original task in the scenario of forked repo, so I want to submit the PR, only allow these kinds of ci task work in the original repo.

Dive Deeper

for some schedule task like:

• Gemini Scheduled PR Triage 🚀
• Gemini Scheduled Issue Triage
• Generate Weekly Community Report 📊
  there is no need to run these task periodly in the forked repo, it will turn out too many failed result.

for Gemini Automated Issue Triage task, it only make sense in the google-gemini/gemini-cli repo. So I want to

Reviewer Test Plan

Testing Matrix

	🍏	🪟	🐧
npm run	❓	❓	❓
npx	❓	❓	❓
Docker	❓	❓	❓
Podman	❓	-	-
Seatbelt	❓	-	-

Linked issues / bugs

[gemini-code-assist]

Note

Gemini is unable to generate a summary for this pull request due to the file types involved not being currently supported.

[warjiang]

I've suffered from ci task error, especially for period task:

[warjiang]

@jerop could you help me review the changes?

[ali-aljufairi]

@warjiang you can just disable actions in the forked repo but yeah I also agree it would be better if we dont have to

[warjiang]

@warjiang you can just disable actions in the forked repo but yeah I also agree it would be better if we dont have to

+1

[jackwotherspoon]

While as mentioned this can be disabled on forked repos by the owner of the fork, it is probably best to have it disabled by default on our end.

Thanks for this @warjiang 👍 👏

[warjiang]

@jackwotherspoon Hi, can we move forward this PR

[mattKorwel]

Thanks for getting this in. This was definitely on my list of things to update. Appreciate the contribution.