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/debug_account_data.rs

@@ -0,0 +1,20 @@
+use std::{cmp, fmt};
+
+pub(crate) const MAX_DEBUG_ACCOUNT_DATA: usize = 64;
+
+pub fn debug_account_data(data: &[u8], f: &mut fmt::DebugStruct<'_, '_>) {
+    let data_len = cmp::min(MAX_DEBUG_ACCOUNT_DATA, data.len());
+    if data_len > 0 {
+        f.field("data", &Hex(&data[..data_len]));
+    }
+}
+
+pub(crate) struct Hex<'a>(pub(crate) &'a [u8]);
+impl fmt::Debug for Hex<'_> {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        for &byte in self.0 {
+            write!(f, "{:02x}", byte)?;
+        }
+        Ok(())
+    }
+}