Update itertools and axum versions

[sergerad]

Closes #642

• Updates itertools and axum dependancy versions
• Adds itertools as a workspace dependancy

Noting that rusqlite must remain at 0.32.1 due to deadpool-sqlite's version requirements here.

╰─➤  cargo upgrades
miden-node-store
dependency  current  upgrade
rusqlite    0.32.1   0.33.0

[Mirko-von-Leipzig]

Changes itself are good. Some downsides are that we have multiple versions of axum et al in our lockfile now because tonic is still using the previous version.

Some extra compile time or we could wait for tonic to upgrade. Though I don't mind much either way.

[bobbinth]

Looks good! Thank you!

Some downsides are that we have multiple versions of axum et al in our lockfile now because tonic is still using the previous version.

I think this is OK (or at least I don't see big downsides to this).