Update determine runner workflow to use large runners if the branch name matches the rc branching format

[rashidnhm]

Context: This PR introduces a change to the CI, where a PR that matches the naming format of the RC branches (eg: vX.Y.Z-rcN) is automatically on-boarded to use large runner queue without the usage of a label

Description of the Change: This change has been introduced within pennylane-lightning with the following two PRs:

• PennyLaneAI/pennylane-lightning#769
• PennyLaneAI/pennylane-lightning#774

Benefits: Lower wait times for rc branch builds

Possible Drawbacks: As noted in the lightning PRs, though the runners have parity, it is possible for a workflow to fail on the larger runners. The urgent label will be added to this PR to ensure jobs pass.

Related GitHub Issues:

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