deps: Upgrade to Solana v2

[joncinque]

Problem

As part of fixing up #6897, we need to upgrade SPL to use all the v2 crates.

Solution

Taking this commit by commit:

• First we just update everything to v2
• Next we update the lockfile. There's some manual work here to force the SPL dependencies from the monorepo to use v2 to avoid issues
• Update the main toolchain version
• Update the nightly toolchain version
• Fix issues that arise from cargo check
• Fix issues that arise from cargo clippy
• Undo the upgrade on account-compression, since it uses anchor
• Fixup the token-2022 serde build, which requires a protobuf compiler
• Set the version properly everywhere
• Fix the twoxtx build
• Actually, don't set the solana-install version since 2.0.0 doesn't exist yet
• Nevermind, it does work with a new url!

This should be pretty straightforward, but let me know if there's any issues!

[samkim-crypto]

Thanks for the thorough PR description!