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We don't have bind() conflict tests for the same protocol pairs.

Let's add them except for the same address pair, which will be
covered by the following patch adding 6 more bind() calls for
each test case.
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://lore.kernel.org/r/20240326204251.51301-6-kuniyu@amazon.com

Signed-off-by: Jakub Kicinski <kuba@kernel.org>