Unifies ThisInvokeContext and dyn trait InvokeContext. (#21563)

programs/config/src/config_processor.rs

@@ -16,7 +16,7 @@ use std::collections::BTreeSet;
 pub fn process_instruction(
     first_instruction_account: usize,
     data: &[u8],
-    invoke_context: &mut dyn InvokeContext,
+    invoke_context: &mut InvokeContext,
 ) -> Result<(), InstructionError> {
     let keyed_accounts = invoke_context.get_keyed_accounts()?;