YEALINK | Update DECT and handset V87 firmware, add W56H and W71H handset

[quentinleconte]

Hello team,

A bug is present in firmware V87 publicly distributed by Yealink.
Issues are no audio or call drops after upgrading to firmware version V87.

This is a known issue with Yealink, which has released a technical firmware.
The update with this last version fix the issue.

Technical firmware are provided here : https://drive.google.com/drive/folders/1rnCZndv1OvEfZKPcnKF0F2gPYUjOaz2P?usp=sharing

Except for W57R, which can be found there : https://ticket.yealink.com/ticket-service/attachment/downLoadFile?path=U36XW4OZAPVvW7pCjQq%2FFg%3D%3D

This PR provide change in V87 plugin for these firmwares.
In addition, I added V87 firmware provided for W71H & W56H handsets.

Thank you !

[wazo-community-zuul]

Build succeeded.
https://zuul.wazo.community/zuul/t/local/buildset/f7cdffd998b54ca3adc8bf31640bc0d4

✔️ wazo-tox-py311 SUCCESS in 2m 19s
✔️ wazo-tox-linters-provd SUCCESS in 2m 19s
✔️ wazo-provd-plugins SUCCESS in 1m 49s

[wazo-community-zuul]

Build succeeded.
https://zuul.wazo.community/zuul/t/local/buildset/0fe717d4faaa4d18aee8f5838a201f84

✔️ wazo-tox-py311 SUCCESS in 2m 18s
✔️ wazo-tox-linters-provd SUCCESS in 2m 31s
✔️ wazo-provd-plugins SUCCESS in 1m 55s

[fouille]

Hi @quentinleconte,
I hope you're doing well. First of all, thank you for this offer.
Just so you know, I'm waiting for the final version of Yealink before approving your PR. I'll keep you updated after that and my testing.
🙏🏼

[wazo-community-zuul]

Build succeeded.
https://zuul.wazo.community/zuul/t/local/buildset/6297bb7aa5b149728b29fda27b4bfee3

✔️ wazo-tox-py311 SUCCESS in 2m 42s
✔️ wazo-tox-linters-provd SUCCESS in 3m 07s
✔️ wazo-provd-plugins SUCCESS in 2m 18s