imp(ibc-testkit): remove field access of MockContext

[rnbguy]

Bug Summary

Some of the tests are written while accessing MockContext fields. Field access is discouraged over associated methods.

Details

The following should be refactored to use an associated method, e.g., MockContext::ibc_events(&self).

ibc-rs/ibc-testkit/tests/core/ics04_channel/timeout.rs

Lines 380 to 385 in d5e8314

	assert_eq!(ctx.events.len(), 2);
	assert!(matches!(
	ctx.events[0],
	IbcEvent::Message(MessageEvent::Channel)
	));
	assert!(matches!(ctx.events[1], IbcEvent::TimeoutPacket(_)));

Version

till v0.49.1