handling whatsapp cloud extra 9 contact number

[rasoro]

This PR is related to this #437 which was also discussed here #433

[codecov]

Codecov Report

Merging #448 (6ec941e) into main (57732ae) will decrease coverage by 0.01%.
The diff coverage is 56.25%.

@@            Coverage Diff             @@
##             main     #448      +/-   ##
==========================================
- Coverage   72.31%   72.30%   -0.02%     
==========================================
  Files          95       95              
  Lines       12565    12582      +17     
==========================================
+ Hits         9087     9097      +10     
- Misses       2850     2855       +5     
- Partials      628      630       +2     

Impacted Files	Coverage Δ
handlers/facebookapp/facebookapp.go	81.54% <56.25%> (-0.47%)	⬇️

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[norkans7]

I wondering if we really need to use this as now we can just send by phone number

https://developers.facebook.com/docs/whatsapp/cloud-api/reference/messages#message-object

and soon no WA ID will be used at all even for on-prem https://developers.facebook.com/docs/whatsapp/on-premises/reference/contacts

Was the issue reproduced with WhatsApp Cloud before adding this PR?