Fix Rust 1.80 cfg Linting and add VolumeRef impls

[gierens]

Rust 1.80 which is used in functional tests does more extensive cfg linting.
Because volume and identity are not known it causes functional tests to fail.
This adds a linting rule to allow both those values.

For more info see: https://blog.rust-lang.org/2024/07/25/Rust-1.80.0.html#checked-cfg-names-and-values

[gierens]

1.65 tests are failing due to tokio requiring rust 1.70, see #159 for fix

[gierens]

Zed fails, but is EOL anyway, see #160

[dtantsur]

@gierens hi! Shouldn't we add them to the feature list if we use them?

[dtantsur]

Took a deeper look. I guess "volume" should be called "block-storage" now, so it's actually a bug. "identity" is reserved for the future, so maybe it's fair to exclude it in the linter, but also it may be better to just add it.

[gierens]

Took a deeper look. I guess "volume" should be called "block-storage" now, so it's actually a bug. "identity" is reserved for the future, so maybe it's fair to exclude it in the linter, but also it may be better to just add it.

@dtantsur Yeah you're right, I should've looked into the code causing the issue ... I adjusted the PR accordingly:

• I added the identity feature with a comment that it's reserved for future use.
• The VolumeRef feature was changed to block-storage and I added the missing impls in the block-storage module.
• For SnapshotRef this is not gonna work without a snapshot API though, so I simply ignored it in the linting for now, but added TODO comments that this is going to get the block-storage feature once snapshots have been implemented. This is actually next on my list after the CI is fixed, so should really just be a temporary thing.
• The test feature which is used in some tests I also added to the linting rules, since this is not a real feature.

[gierens]

@dtantsur Alright, CI seems to approve. So this is ready for another review.

[dtantsur]

Thanks much!