Memory safety issue: `TryFrom&[u8]>` impls in `device_path` have incorrect lifetime annotations

[nicholasbishop]

These impls were added in uefi-0.29.0, I missed a safety issue when reviewing the code.

The current impls look like this:

impl<'a> TryFrom<&[u8]> for &'a DevicePath { ... }

But they should look like this:

impl<'a> TryFrom<&'a [u8]> for &'a DevicePath { ... }

This wasn't caught by the compiler because internally these impls use unsafe pointer-based code. The missing lifetime means that the &[u8] buffer can be free'd while the &DevicePath still exists, which is UB.

The fix is straightforward, I will put up a PR. I think we should also do a 0.29.1 release since we're not quite ready for a 0.30.0 release yet. EDIT: actually, this is a semver-incompatible change, so it should be a 0.30.0 release. We can branch this off of commit 4e4e190.

cc @andre-braga

[nicholasbishop]

Fix is up: #1282

After that's merged, I will create a version-0.30 branch off of commit 4e4e190, then open a PR to cherry-pick the fix into that branch. Then I'll put up a release PR for the branch. (This will be the first time I've run the release workflow on a branch other than main, but it should be set up to work on version- branches already.)

[nicholasbishop]

I've created the version-0.30 branch with the cherry-pick, and opened a release PR: #1285