Summary
There are a lot of deprecated things in this test class. In an effort to help stop occasional test flakes in PCT, I'll fix some of that.

Details

• Update the calls to new CpsFlowDefinition, like the one shown here. CpsFlowDefinition is expecting a second argument, a boolean, and most of the calls to it in this test don't have it. I'll change the constructor calls to use the current one.
• Update much (but probably not all) of the sample pipeline code being used in this test, so that it has block-scoped stages. Without which, you'll see a lot of messages like this in your logs:

  [Pipeline] {
  [Pipeline] stage (hey)
  Using the ‘stage’ step without a block argument is deprecated