selftests/bpf: Add tests for tail calls with locks and refs

Add failure tests to ensure bugs don't slip through for tail calls and
lingering locks, RCU sections, preemption disabled sections, and
references prevent tail calls.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20241103225940.1408302-4-memxor@gmail.com


Signed-off-by: Alexei Starovoitov <ast@kernel.org>