CI: Split the Build Jobs for Arm64 and x86_64

[lupyuen]

Summary

This PR syncs apache/nuttx#14282 from nuttx repo to nuttx-apps.

Impact

See apache/nuttx#14282

Testing

See apache/nuttx#14282

[nuttxpr]

[Experimental Bot, please feedback here]

Yes, but with minor improvements:

While concise, referencing the original PR for Impact and Testing might make reviewers jump between PRs. It's better to summarize key points directly:

Improved Summary:

• Why: Keeps nuttx-apps in sync with the latest changes in nuttx (referencing the specific fix/feature from PR #14282).
• What: Syncs the changes introduced in nuttx PR #14282.
• How: Direct code synchronization.

Improved Impact:

• Briefly list the actual impact points from PR #14282, e.g., "Adds new feature X", "Affects ARM boards", "Requires documentation updates".

Improved Testing:

• Instead of "See #14282", briefly state:
  • IF testing in nuttx-apps is identical to nuttx: "Testing unchanged, see #14282 for details".
  • IF there are nuttx-apps specific tests: Include a concise summary of those results.

By making these sections self-contained, you improve the review experience and reduce back-and-forth.