Variable flow condenser plant control

[lymereJ]

Pull request overview

• Fixes Chiller always requests full condenser flow regardless of flow mode or pump type #7111
• This PR intends to fix the aforementioned issue by adding options to simulate variable flow condenser plant control for selected chiller models.

NOTE: ENHANCEMENTS MUST FOLLOW A SUBMISSION PROCESS INCLUDING A FEATURE PROPOSAL AND DESIGN DOCUMENT PRIOR TO SUBMITTING CODE

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