s3:smbd: fix MultipleChannel_Negative_SMB2002

Return STATUS_REQUEST_NOT_ACCEPTED if negotiated dialect < SMB2_22.

In SDC 2020 SMB3 Virtual IO Lab,
run Windows Protocol Test Suite to test FileServer,
test case MultipleChannel_Negative_SMB2002 is failed.

(part of) debug logs said:
SessionSetup is expected to fail with STATUS_REQUEST_NOT_ACCEPTED.
but actually it got STATUS_USER_SESSION_DELETED.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=14512

Signed-off-by: Jones Syue <jonessyue@qnap.com>
35 jobs for jones2019_fix_MultipleChannel_Negative_SMB2002_v2 in 82 minutes and 28 seconds (queued for 3 seconds)
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