Include stacks info Url in tooling feed.

[pragnagopa]

cc @soninaren
Temporary location for stacks: https://github.com/pragnagopa/azure-functions-supported-runtime-stacks

This info will be available on public endpoint soon. We should figure out what is the best way to include in tooling feed.

[soninaren]

I would advice adding this information to the tooling feed only if absolutely necessary. Otherwise my recommendation would be to add this info in an independent feed.

[pragnagopa]

@soninaren - can you please add notes on why you think stacks info should not be included in tooling feed? From my perspective, stacks information is purely for helping tools with the create flow. One of the purpose of this tooling feed is to fulfill create sceanarios right?