az functionapp should not set `WEBSITE_NODE_DEFAULT_VERSION` for all Linux apps

[Francisco-Gamino]

az feedback auto-generates most of the information requested below, as of CLI version 2.0.62

Describe the bug
az function app should not set WEBSITE_NODE_DEFAULT_VERSION for Linux function apps
https://github.com/Azure/azure-cli/blob/dev/src/azure-cli/azure/cli/command_modules/appservice/custom.py#L2438

To Reproduce
Create a Linux function app. Notice that the app setting WEBSITE_NODE_DEFAULT_VERSION is being set, but should not be the case.

Expected behavior
The app setting WEBSITE_NODE_DEFAULT_VERSION should not be set.

[Francisco-Gamino]

cc: @gzuber @pragnagopa @ankitkumarr

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @ahmedelnably, @fabiocav

[yonzhan]

functionapp.

[kamperiadis]

Closing as this is no longer relevant.