CI: Rework ORT workflows to support the new branching model

[ikolomi]

Describe the bug

ORT checkers run only on the main branch.
This might lead to undetected licensing issues on the release branches

Expected Behavior

ORT checkers cover all the relevant branches reliably

Current Behavior

ORT checkers run only on the main branch.

Reproduction Steps

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Possible Solution

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Additional Information/Context

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Client version used

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Engine type and version

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OS

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Language

TypeScript, Python, Java, Rust, Go

Language Version

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Other information

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