func templates list should not show me all templates once my language is selected

core tools version: 4.0.4829 (x64 on rosetta to use python)
OS: MacOs Montery 12.6 (Mac M1 Pro)

When I did a `func templates list` I was surprised it showed me a lot of templates that could not apply to me (C#, Custom, JS, PowerShell, etc), since I already chose Python as a part of `func init`. This isn't a great experience because my relevant python ones went off the screen. It also got me thinking about why are the templates lists different between the language.

The ask is to filter on template list output IFF the language is selected. In fact, for a `func new` without a `func init`, you still get prompted for language. so I can't see any cases that this current experience makes sense. Am I missing any?

```console

paulyuk@Pauls-MBP-2  ~/src/functions/templates  func templates list
C# Templates:
Azure Blob Storage trigger
Azure Cosmos DB trigger
Durable Functions activity
Durable Functions entity (class)
Durable Functions entity (function)
Durable Functions Entity HTTP starter
Durable Functions HTTP starter
Durable Functions orchestrator
Azure Event Grid trigger
Azure Event Hub trigger
HTTP trigger
IoT Hub (Event Hub)
Kafka output
Kafka trigger
Azure Queue Storage trigger
RabbitMQ trigger
SendGrid
Azure Service Bus Queue trigger
Azure Service Bus Topic trigger
SignalR negotiate HTTP trigger
Timer trigger

Custom Templates:
Azure Blob Storage trigger
Azure Cosmos DB trigger
Azure Event Grid trigger
Azure Event Hub trigger
HTTP trigger
IoT Hub (Event Hub)
Kafka trigger
Azure Queue Storage trigger
RabbitMQ trigger
SendGrid
Azure Service Bus Queue trigger
Azure Service Bus Topic trigger
SignalR negotiate HTTP trigger
Timer trigger

JavaScript Templates:
Azure Blob Storage trigger
Azure Cosmos DB trigger
Durable Functions activity
Durable Functions entity
Durable Functions Entity HTTP starter
Durable Functions HTTP starter
Durable Functions orchestrator
Azure Event Grid trigger
Azure Event Hub trigger
HTTP trigger
IoT Hub (Event Hub)
Kafka output
Kafka trigger
Azure Queue Storage trigger
RabbitMQ trigger
SendGrid
Azure Service Bus Queue trigger
Azure Service Bus Topic trigger
SignalR negotiate HTTP trigger
Timer trigger

PowerShell Templates:
Azure Blob Storage trigger
Azure Cosmos DB trigger
Durable Functions activity
Durable Functions HTTP starter
Durable Functions orchestrator
Azure Event Grid trigger
Azure Event Hub trigger
HTTP trigger
IoT Hub (Event Hub)
Kafka output
Kafka trigger
Azure Queue Storage trigger
RabbitMQ trigger
SendGrid
Azure Service Bus Queue trigger
Azure Service Bus Topic trigger
SignalR negotiate HTTP trigger
Timer trigger

Python Templates:
Azure Blob Storage trigger
Azure Cosmos DB trigger
Durable Functions activity
Durable Functions entity
Durable Functions HTTP starter
Durable Functions orchestrator
Azure Event Grid trigger
Azure Event Hub trigger
HTTP trigger
Kafka output
Kafka trigger
Azure Queue Storage trigger
RabbitMQ trigger
Azure Service Bus Queue trigger
Azure Service Bus Topic trigger
Timer trigger

TypeScript Templates:
Azure Blob Storage trigger
Azure Cosmos DB trigger
Durable Functions activity
Durable Functions entity
Durable Functions Entity HTTP starter
Durable Functions HTTP starter
Durable Functions orchestrator
Azure Event Grid trigger
Azure Event Hub trigger
HTTP trigger
IoT Hub (Event Hub)
Kafka output
Kafka trigger
Azure Queue Storage trigger
RabbitMQ trigger
SendGrid
Azure Service Bus Queue trigger
Azure Service Bus Topic trigger
SignalR negotiate HTTP trigger
Timer trigger

```

Start at the `func templates list` command and the language selection established by `func init` or prompted during `func new`. Trace how templates are grouped and confirm that, once a language is selected, the output contains only that language's templates while preserving the existing all-language behavior when no language is selected.

Written by the indexing model from the issue text.