[LEBV-327] Change error message to numbers starting by "0"
🎯 Summary
Before
Now
🧪 How to test
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Repeat the steps documented here : !57 (merged) but in the branch 'LEBV-327-phone-validation_message-error'
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If you introduce a number starting by "0" you should see something similar to the last attached image.
🧠 Considerations
🧐 Checklist
- Changes work in Google Chrome
- Changes work in Safari
- UI is responsive

