Describe the bug
Since hybrid-connections are now supported on Linux webapps via the portal, it should also be supported via CLI,
The following warning message appears: "hybrid connections not supported on linux app." and it does not add the hybrid-connection.

To Reproduce
execute command on linux webapp:
az webapp hybrid-connection add --hybrid-connection
--name
--namespace
--resource-group
[--slot]
[--subscription]

Expected behavior
A hybrid connection should be added to the linux webapp

Environment summary

Linux-4.15.0-1106-azure-x86_64-with-debian-10.2 (Cloud Shell)
Python 3.6.10
Installer: DEB

azure-cli 2.19.0 *

Additional context
Documentation does not mention that this does not work on linux webapps