program-test: Add ability to warp to the future (#14998)

* program-test: Add ability to warp to the future

* Make `start_local_server` take by value

* Remove clear_invoke_context

program-test/tests/fuzz.rs

@@ -16,7 +16,6 @@ fn process_instruction(
     _accounts: &[AccountInfo],
     _input: &[u8],
 ) -> ProgramResult {
-    // if we can call `msg!` successfully, then InvokeContext exists as required
     msg!("Processing instruction");
     Ok(())
 }