chore(ci): add workflow dispatch for SAR

[sthulb]

Issue number: #4189

Summary

Changes

Please provide a summary of what's being changed

Adds a dispatch call for the reusable_deploy_v3_sar.yml

User experience

Please share what the user experience looks like before and after this change

Checklist

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• Meet tenets criteria
• I have performed a self-review of this change
• Changes have been tested
• Changes are documented
• PR title follows conventional commit semantics

Is this a breaking change?

RFC issue number:

Checklist:

• Migration process documented
• Implement warnings (if it can live side by side)

Acknowledgment

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