Update and consolidate dependencies (#3136)

## Proposed Changes

I did some gardening 🌳 in our dependency tree:

- Remove duplicate versions of `warp` (git vs patch)
- Remove duplicate versions of lots of small deps: `cpufeatures`, `ethabi`, `ethereum-types`, `bitvec`, `nix`, `libsecp256k1`.
- Update MDBX (should resolve #3028). I tested and Lighthouse compiles on Windows 11 now.
- Restore `psutil` back to upstream
- Make some progress updating everything to rand 0.8. There are a few crates stuck on 0.7.

Hopefully this puts us on a better footing for future `cargo audit` issues, and improves compile times slightly.

## Additional Info

Some crates are held back by issues with `zeroize`. libp2p-noise depends on [`chacha20poly1305`](https://crates.io/crates/chacha20poly1305) which depends on zeroize < v1.5, and we can only have one version of zeroize because it's post 1.0 (see https://github.com/rust-lang/cargo/issues/6584). The latest version of `zeroize` is v1.5.4, which is used by the new versions of many other crates (e.g. `num-bigint-dig`). Once a new version of chacha20poly1305 is released we can update libp2p-noise and upgrade everything to the latest `zeroize` version.

I've also opened a PR to `blst` related to zeroize: https://github.com/supranational/blst/pull/111

validator_client/Cargo.toml

@@ -30,7 +30,7 @@ dirs = "3.0.1"
 directory = { path = "../common/directory" }
 lockfile = { path = "../common/lockfile" }
 environment = { path = "../lighthouse/environment" }
-parking_lot = "0.11.0"
+parking_lot = "0.12.0"
 exit-future = "0.2.0"
 filesystem = { path = "../common/filesystem" }
 hex = "0.4.2"
@@ -47,9 +47,9 @@ warp_utils = { path = "../common/warp_utils" }
 warp = "0.3.2"
 hyper = "0.14.4"
 eth2_serde_utils = "0.1.1"
-libsecp256k1 = "0.6.0"
+libsecp256k1 = "0.7.0"
 ring = "0.16.19"
-rand = { version = "0.7.3", features = ["small_rng"] }
+rand = { version = "0.8.5", features = ["small_rng"] }
 lighthouse_metrics = { path = "../common/lighthouse_metrics" }
 lazy_static = "1.4.0"
 itertools = "0.10.0"