Update azure tested instance type doc[1] to add the following series.

CORS-3634 List Azure's NDs-series and NV-series as tested instance type
* StandardNVadsV710v5Family
* Standard NDASv4_A100 Family

CORS-3771 Azure - Add support for Dxv6 machine series
* StandardDsv6Family
* StandardDdsv6Family
* StandardDlsv6Family
* StandardDldsv6Family

CORS-3772 Azure - Add support for Lsv4 and Lasv4 machine series
* standardLsv4Family
* standardLasv4Family     


[1] https://github.com/openshift/installer/blob/main/docs/user/azure/tested_instance_types_x86_64.md  

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   The purpose of this bug is to backport the update to 4.19, so that those families can be synced to 4.19 installation document.