Extract program-error crate

[kevinheavey]

Problem

solana_program::program_error needs to be made available outside solana-program

This branches off #2405 so that needs to be merged first.

Summary of Changes

• move program_error.rs to its own crate and re-export its contents for backwards compatibility
• make serde optional in the new crate
• remove thiserror from the new crate

[mergify]

The Firedancer team maintains a line-for-line reimplementation of the
native programs, and until native programs are moved to BPF, those
implementations must exactly match their Agave counterparts.
If this PR represents a change to a native program implementation (not
tests), please include a reviewer from the Firedancer team. And please
keep refactors to a minimum.

[joncinque]

Looks good to me! Just the one missing space, but it looks like rustfmt doesn't care. @yihau can you accept solana-program-error?

[joncinque]

Gosh, this makes so much more sense

[joncinque]

I agree with your approach of not making this no-std -- if we ever want to do it, we can introduce a breaking change later.

[yihau]

crate-check passed!