Use nbe genereate --recreate in githhub action

[alexbozhenko]

After removing all the outputs:

find . -name output.cast -or  -name output.txt | xargs rm
nbe generate recording   --recreate

I see that the following files are not recreated, meaning the examples are failing to build or regeneration is not happening for some other reason...:

[alex@omenlaptop nats-by-example]$ git status | grep deleted | grep \.txt
        deleted:    examples/auth/nkeys-jwts/go/output.txt
        deleted:    examples/embedded/mtls/go/output.txt
        deleted:    examples/jetstream/ack-ack/csharp/output.txt
        deleted:    examples/jetstream/ack-ack/go/output.txt
        deleted:    examples/jetstream/api-migration/dotnet/output.txt
        deleted:    examples/jetstream/api-migration/go/output.txt
        deleted:    examples/jetstream/interest-stream/csharp/output.txt
        deleted:    examples/jetstream/interest-stream/go/output.txt
        deleted:    examples/jetstream/limits-stream/csharp/output.txt
        deleted:    examples/jetstream/limits-stream/go/output.txt
        deleted:    examples/jetstream/limits-stream/node/output.txt
        deleted:    examples/jetstream/limits-stream/rust/output.txt
        deleted:    examples/jetstream/list-subjects/csharp/output.txt
        deleted:    examples/jetstream/list-subjects/go/output.txt
        deleted:    examples/jetstream/pull-consumer-limits/csharp/output.txt
        deleted:    examples/jetstream/pull-consumer-limits/go/output.txt
        deleted:    examples/jetstream/pull-consumer/csharp/output.txt
        deleted:    examples/jetstream/pull-consumer/go/output.txt
        deleted:    examples/jetstream/workqueue-stream/csharp/output.txt
        deleted:    examples/jetstream/workqueue-stream/go/output.txt
        deleted:    examples/kv/intro/csharp/output.txt
        deleted:    examples/kv/intro/go/output.txt
        deleted:    examples/messaging/concurrent/csharp/output.txt
        deleted:    examples/messaging/iterating-multiple-subscriptions/csharp/output.txt
        deleted:    examples/messaging/json/csharp/output.txt
        deleted:    examples/messaging/protobuf/csharp/output.txt
        deleted:    examples/messaging/pub-sub/csharp/output.txt
        deleted:    examples/messaging/pub-sub/node/output.txt
        deleted:    examples/messaging/request-reply/csharp/output.txt
        deleted:    examples/os/intro/csharp/output.txt
        deleted:    examples/services/intro/csharp/output.txt

This change will trigger image rebuild and will exercise all the examples to catch broken builds.

When --exit-on-error was added in
https://github.com/ConnectEverything/nats-by-example/pull/81/files by @scottf
was the idea to use the generate command as a way of running tests?

[alexbozhenko]

Also, because --recreate is not passed
E.g. this was landed:
#189
but old screencast is till there:
https://natsbyexample.com/examples/jetstream/limits-stream/python