Fixed broken tests and cleanup

- Cargo.lock removed from .gitignore (previous recommendation to not check in Cargo.lock for libraries has changed)
- Deploy non-upgradable program is no longer supported (solana-labs/solana#34424) - deploy_program function was kept for backwards compatibility but now uses upgradable loader)
- Fixed outdate processor macro. Also now it is possible to use this macro with new anchor entrypoint function.
- Updated structure of the new Pyth Oracle price account.
- Replaced various deprecated functions and structs with new equivalents.
- Fixed most of the compiler warnings.
- Bumped dependencies versions.

Author: AdamHalborn

.gitignore

@@ -2,10 +2,6 @@
 # will have compiled files and executables
 /target/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
-Cargo.lock
-
 # These are backup files generated by rustfmt
 **/*.rs.bk