Description of changes:

This change fixes an issue where the following happens:

• The TCP acceptor removes a stream at index N, due to it being expired
• The tokio runtime is notified of stream readiness at index N and wakes the task
• The task polls the worker, which is no longer reading from the stream, which was previously assumed to not happen

Testing:

I've made the fuzz tests less constrained to trigger this series of events. If I simply apply the test change, then it shows the error:

---- stream::server::tokio::tcp::manager::tests::invariants_test stdout ----

======================== Test Failure ========================

BOLERO_RANDOM_SEED=148028850864596720821768053785163681304

Input: 
[
    Wake {
        idx: 1,
    },
    Insert,
]

Error: 
panicked at dc/s2n-quic-dc/src/stream/server/tokio/tcp/manager/tests.rs:94:17:
internal error: entered unreachable code: shouldn't be polled when idle
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.