Data plane tier-1 requirements between beta and stable release

> The SDK policies published on GitHub show inconsistencies between the language requirements for Beta and Stable SDKs. I highlighted the relevant content in the screenshot below.
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> It is illogical to require only two languages for Beta SDKs while mandating support for all tier-1 languages for Stable SDKs. Additionally, the APEX requirements for Beta SDKs mandate the release in all tier-1 languages.
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> I recommend updating the Beta SDK policies to require support for all tier-1 languages. If a Service team needs to stagger the language releases due to time constraints, they can request an exception. We will then use a different release plan to track and ensure the requirement is met.
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> Once the policy is updated, we should be able to leverage the same UI, back-end, and email template. The email should go to the azsdkapex alias and probably the arch board help desk.
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_Originally posted by @ladonnaq in [#5297](https://github.com/Azure/azure-sdk-tools/issues/5297#issuecomment-2477393624)_