Upgrade to rust 1.52.1

[mrmr1993]

This PR depends on #9074.

This is part of upgrading from zexe to arkworks, which requires an upgrade to the latest rust (due to non-backwards-compatible typechecker changes in rust 1.49).

The changes in the marlin and zexe repos are minimal, and a build of this PR is able to connect and sync to mainnet, but this probably requires further testing to ensure that the new compiler doesn't cause issues with the existing OCaml-to-rust bindings.

Checklist:

• Document code purpose, how to use it
  • Mention expected invariants, implicit constraints
• Tests were added for the new behavior
  • Document test purpose, significance of failures
  • Test names should reflect their purpose
• All tests pass (CI will check this if you didn't)
• Serialized types are in stable-versioned modules
• Does this close issues? List them:

[aneesharaines]

@deepthiskumar to help test this change

[mrmr1993]

We've seen a segfault on test-labels (the net running this PR) 😭 I've pulled in #8774 to get more info if it happens again, and merged compatible to test that CI still passes against the latest changes.

This is the first memory corruption issue in 9 days of network uptime, across 8 nodes. Given the infrequency, and given that we've also seen exactly one segfault on devnet within the same period, I would prefer not to block merging this on discovering the source of that fault, especially since it may not be the cause at all.