Likely not. Mutation that will help to survive this type of sterilization likely will not help virus to be more effective in other aspects. For example extremophiles are not very effective as infections.
Could virus mutate to be resistant to that? Sure, why not. Will it be super-virus? Depends on what is super-virus. If it means more deadly, then probably not, since this resistance is most likely not related to deadliness.
In fact the mutation is likely to make it slightly less deadly, since it's likely to involve tradeoffs that make the virus less fit for other purposes.
Not within our lifetimes (and several thousands of years on top of that), probably
We have antibiotic resistant bacteria already today, and antibiotics were invented less than 100 years ago.
That's a very different thing. Adapting to antibiotics is not comparable to adapting to something wildly different and new