Remove dependency on hex (#21567)

* Remove dependency on `hex`

* Update lock file

* Use `debug_struct` instead of own format

* Share code, add test, and fix rent_epoch spelling

Co-authored-by: Tyera Eulberg <tyera@solana.com>

sdk/program/src/lib.rs

@@ -13,6 +13,7 @@ pub mod bpf_loader;
 pub mod bpf_loader_deprecated;
 pub mod bpf_loader_upgradeable;
 pub mod clock;
+pub mod debug_account_data;
 pub mod decode_error;
 pub mod ed25519_program;
 pub mod entrypoint;