Reassess template curation for isolated worker model

[mattchenderson]

Some templates are missing from the func new gesture when using the isolated worker model. Namely, Durable Functions templates are missing. This seems like an outdated consideration from before Durable support was available for the isolated worker model.

See: https://github.com/Azure/azure-functions-core-tools/blob/cf9abe09c4cc23e06ac4dcb30a854ac5ba363a7d/src/Cli/func/Helpers/DotnetHelpers.cs#L155-L197

In theory, most all of these could be exposed, and we could remove any special handling here. We should assess the list and ensure we have a complete set exposed.

To that end, we should also explore this not being a hard-coded list.

[liliankasem]

I think related to this issue #2955 - would be great to get this fixed