Graceful Shutdown for template node18 functions

[NikhilSharmaWe]

Expected Behaviour

When a function receives a SIGTERM signal the function should first handle the current ongoing requests before terminating the function.

Current Behaviour

Currently, when a function receives a SIGTERM signal, the function immediately terminates.

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Which Solution Do You Recommend?

Handle the condition when a function recieves a SIGTERM signal. Wait for some graceful period before terminating if the function have an ongoing request, otherwise terminate without waiting.