Enable executingStateIds system search attributes for only states that have waitUntil

[longquanzheng]

The current executingStateIds is too expensive when setting the SA value for every state -- where most states don't have waitUntil and will get passed very quickly.

Mostly, 99% the cases, people only need it when a state has a waitUntil.

This will be very handy to find the states that are waiting on something. Knowing these states will help removing the code.

Ideally, the options to provide to client (via WorkflowConfig)

• Enable it for any state (even doesn't have waitUntil)
• Enable it only for state that has waitUntil (preferred as default)
• Disable (right now this is default for internal)