[CI] Disable all automatic workflow triggers - #8117

Motivation

FastDeploy is no longer under active development, so the repository no longer requires unattended CI execution.

Continuing to run scheduled and event-triggered workflows would unnecessarily consume CI runner resources and maintain workflows that are no longer actively used. At the same time, keeping workflow_dispatch allows workflows to be manually restored or executed if needed in the future.

Modifications

• Disabled automatic triggers across the 18 affected workflows, including:
  • pull_request
  • pull_request_target
  • push
  • schedule
  • issue_comment
• Kept only workflow_dispatch for manual workflow execution.
• Stopped the two remaining daily scheduled jobs:
  • ci_image_update.yml
  • publish_job.yml
• Left reusable workflows using workflow_call unchanged, as they are no longer reachable from automatically triggered workflows.
• Preserved the existing workflow configuration in a recoverable form instead of deleting the workflows entirely.
• Prevented unattended CI jobs from continuing to consume runner resources.

Usage or Command

N/A

Accuracy Tests

N/A

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.