Daily qml builds with RC environment

[runora95]

Title:
Daily QML builds with the RC environment when it exists.

Summary:

• Adds a workflow to run daily QML builds with the RC environment. The workflow checks if an RC branch exists in Pennylane. If an RC branch exists it then gets the latest versions of pennylane, catalyst, and lightning from PyPI, updates the demo.py file with them, and builds the demos.

Relevant references:
Example demo.py configuration for an RC build

Possible Drawbacks:
None

Related GitHub Issues:
1579