Try additional nuget retries (#66306)

Try additional nuget retries (#66306)

After adding NUGET_EXPERIMENTAL_CHAIN_BUILD_RETRY_POLICY, we still see
some benchmarks SPMI collection runs fail with the same nuget errors.

In case this is actually a potential workaround, try increasing the
number of retries and delay between them.

Also, print out the environment used so we can verify it, and see if
there are any other relevant variables set.