Refactoring: Move KeyedAccounts to InvokeContext (#15410)

Collects all parametric occurrences and the construction of keyed_accounts and puts them into InvokeContext.

programs/secp256k1/src/lib.rs

@@ -1,11 +1,9 @@
 use solana_sdk::{
-    instruction::InstructionError, keyed_account::KeyedAccount, process_instruction::InvokeContext,
-    pubkey::Pubkey,
+    instruction::InstructionError, process_instruction::InvokeContext, pubkey::Pubkey,
 };
 
 pub fn process_instruction(
     _program_id: &Pubkey,
-    _keyed_accounts: &[KeyedAccount],
     _data: &[u8],
     _invoke_context: &mut dyn InvokeContext,
 ) -> Result<(), InstructionError> {