feature: enable unstable Temporal API in Deno

[martinrlilja]

Hello,

I would like to use the new Temporal API in Deno.

https://docs.deno.com/api/web/~/Temporal
https://developer.mozilla.org/en-US/blog/javascript-temporal-is-coming/

However it is gated behind the flag --unstable-temporal. I saw that I can add the flag to DENO_FLAGS but doing so disables many other flags required for deno to execute on the workers.

https://github.com/windmill-labs/windmill/blob/v1.457.0/backend/windmill-worker/src/deno_executor.rs#L381-L395

Maybe --unstable-temporal could be added as a default deno flag together with the others?

Another alternative to DENO_FLAGS would also be nice. One that doesn't disable any of the default flags.

Edit: Reading the code again I noticed that since we don't use NSJAIL we only have to add -A giving us DENO_FLAGS="--unstable-temporal --allow-all". Without it we got the error NotCapable: Requires read access to "args.json".