Ensure random_2_in_2_out_rtx() suspends on first execution

[eval-exec]

What problem does this PR solve?

This CI action failed, because the 2_in_2_out_rtx may completed after first run.
And we didn't handle the else case:

ckb/script/src/verify/tests/ckb_latest/features_since_v2021.rs

Lines 851 to 853 in dbbca4e

	if let VerifyResult::Suspended(state) = verifier.resumable_verify(step_cycles).unwrap() {
	init_snap = Some(state.try_into().unwrap());
	}

Then init_state will be None, and panic will happen.

Since the random_2_in_2_out_rtx will consume 3276322 cycles, increase CYCLE_BOUND from 200_000 to 250_000 will make sure suspend/resume will happen in verification.

What's Changed:

Related changes

• Increase CYCLE_BOUND to 250_000

Check List

Tests

• Unit test
• Integration test
• Manual test (add detailed scripts or steps below)
• No code ci-runs-only: [ quick_checks,linters ]

Side effects

• None

Release note

None: Exclude this PR from the release note.