[supervisor] backoff port auto expose on deadline exceeded #3120
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What it does
Right now we are trying to auto expose ports each 5s from the supervisor. This PR implements the backoff with 1.5 factor up to half a minute delay.
How to test
In logs, you should see that first port gets exposed immediately. For the second port you should see many retries with 1.5 factor and after 1m it gets exposed too.