Build Cloud-hypervisor on every PR

[russell-islam]

Summary of the PR

Please summarize here why the changes in this PR are needed.

Requirements

Before submitting your PR, please make sure you addressed the following requirements:

• [ ] All commits in this PR have Signed-Off-By trailers (with git commit -s), and the commit message has max 60 characters for the summary and max 75 characters for each description line.
• [ ] All added/changed functionality has a corresponding unit/integration test.
• [ ] All added/changed public-facing functionality has entries in the "Upcoming Release" section of CHANGELOG.md (if no such section exists, please create one).
• [ ] Any newly added unsafe code is properly documented.

[liuw]

Are we ready to make stability commitments?

Can we also build vfio crates?

[russell-islam]

Are we ready to make stability commitments?

Can we also build vfio crates?

I did not think about stability commitment but we need to build CLH for mshv chnages as I found many times clh build breaks. We can always disable this action if needed.

I can add vfio in another pr.