ILM tests have switches with impossible branches

[pugnascotia]

The following ILM tests all contain switch statements with branches that will never execute. The tests use a between(x, y) switch expression, but there are case values that are outside the randomised range. We need to fix these before #88739 can be merged. By "fix", I mean either remove the spurious cases, or if we actually want them, then extend the randomized range.

• ActionConfigStatsTests
• AllocateActionTests
• CopyExecutionStateStepTests
• RolloverActionTests
• WaitForRolloverReadyStepTests

[elasticsearchmachine]

Pinging @elastic/es-data-management (Team:Data Management)

[joegallo]

I fixed some of these already on #83345, I'll get a clean PR up that just addresses only these and fixes them. Thanks, @pugnascotia!