Enforce default and max. dynamic sku function timeout for Linux consumption

[brettsam]

Discussion for #1915

[brettsam]

Only note from the review:

• Detection should change to use function.invoke.latency metrics.

[fabiocav]

@balag0 do you have an issue tracking the work that needs to be done? If possible, it would be good to have that done in sprint 107

[balag0]

@pragnagopa actually fixed this already - Azure/azure-functions-host#7438

[fabiocav]

Great! thank you