test: Fix flaky test in SentryHub (#1392)
test: Fix flaky test in SentryHub (#1392)

The validation of testCatpureMultipleExceptionWithSessionInParallel and
testCatpureMultipleErrorsWithSessionInParallel mistakenly assumed that
the error count of the captured sessions has to be in order, which is doesn't
have to as the test is using a concurrent DispatchQueue.
getsentry/sentry-swift,getsentry/sentry-swift