<While> condition is checked too often

[tfranzer]

Describe the bug
Having a While loop in the workflow will create the While primitive multiple times, including checking the condition (which might be a performance hit)

To Reproduce
Run Sample10, add console outputs in a While ctor and the getter/setter of the Data.Counter
Output will be like this

Starting workflow...
Write Counter 0
Hello
While ctor
Read Counter 0
While ctor
Read Counter 0
Doing something...
While ctor
Read Counter 0
Read Counter 0
Write Counter 1
While ctor
Read Counter 1
While ctor
Read Counter 1
While ctor
Read Counter 1
Doing something...
While ctor
Read Counter 1
Read Counter 1
Write Counter 2
While ctor
Read Counter 2
While ctor
Read Counter 2
While ctor
Read Counter 2
Doing something...
While ctor
Read Counter 2
Read Counter 2
Write Counter 3
While ctor
Read Counter 3
While ctor
Read Counter 3
Goodbye

Expected behavior
A check for the while condition should be done once per loop