selftest: tcp: Add v4-v4 and v6-v6 bind() conflict tests.

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>