This moves to Rust 1.86 as were prior on Rust 1.81, and the new alloy
dependencies require 1.82.
The revm API changes were notable for us. Instead of relying on a modified call
instruction (with deep introspection into the EVM design), we now use the more
recent and now more prominent Inspector API. This:
1) Lets us perform far less introspection
2) Forces us to rewrite the gas estimation code we just had audited
Thankfully, it itself should be much easier to read/review, and our existing
test suite has extensively validated it.
This resolves 001 which was a concern for if/when this upgrade occurs. By doing
it now, with a dedicated test case ensuring the issue we would have had with
alloy-core 0.8 and `validate=false` isn't actively an issue, we resolve it.
Preserves the fn accessors within the Monero crates so that we can use statics
in some cfgs yet not all (in order to provide support for more low-memory
devices) with the exception of `H` (which truly should be cached).
Adds a Rust toolchain file to be less disruptive to developers who don't keep
their toolchain synchronized (by now having rustup automatically synchronize).
Hopefully helps resolve how +nightly clippy may pass for the coordinator, yet
building would fail due to stable's (hopefully prior?) failure to model some
async functions re: Send/Sync.
Also adds rust-src as a component in preparation of
https://github.com/paritytech/polkadot-sdk/pull/2217