[CAL-938] Localisation of {EVENT_DATE} in workflows

### Issue Summary

There is no localisation of {EVENT_DATE} variable in email / SMS workflows. All our users are French and they recieve email / SMS notifications in French with an event date in English. Examples below:
![image](https://user-images.githubusercontent.com/33749906/214859975-5e369e18-b27f-41f1-846f-7924ebb4ab56.png)
<img width="1078" alt="image" src="https://user-images.githubusercontent.com/33749906/214860046-9035ad16-730f-4466-b3a2-6708505ac39c.png">



<sub>[CAL-938](https://linear.app/calcom/issue/CAL-938/localisation-of-event-date-in-workflows)</sub>

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[CAL-938] Localisation of {EVENT_DATE} in workflows #6733

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[CAL-938] Localisation of {EVENT_DATE} in workflows #6733

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