[BUG] Setup DCPower instrumentation doesn't support same channel on multiple sites

[swuwu15]

Describe the bug
When having a pin connection definined on the pin map such as follows:

Connection pin="Vdd" siteNumber="0,1" instrument="SMU_4162_C2_S10" channel="0"

The SetupNIDCPowerInstrumentation method will error out throwing a runtime error due to a duplicated key in the dictionary.

To Reproduce
Steps to reproduce the behavior:

1. Define a DUT pin in the pinmap and more than 1 site.
2. In the connections, assign the pin for the first site to a DC power channel.
3. Assign the same DC power channel to the pin for the second site and subsequent other sites.
4. Run the SetupNIDCPowerInstrumentation from Process setup with all sites enabled.

Expected behavior
Method should cache the pin and site information of the instrument session despite being shared among sites.

Screenshots

System Setup(please complete the following information):

• STS Software Version: 24.5.1
• Hardware: Virtual Machine
• Instrumentation: PXIe-4162 (simulated)

NI Support Status
Has this issue been reviewed separately by NI Support team member? No it hasn't.