selftests/bpf: Add test to verify tailcall and freplace restrictions

Add a test case to ensure that attaching a tail callee program with an
freplace program fails, and that updating an extended program to a
prog_array map is also prohibited.

This test is designed to prevent the potential infinite loop issue caused
by the combination of tail calls and freplace, ensuring the correct
behavior and stability of the system.

Additionally, fix the broken tailcalls/tailcall_freplace selftest
because an extension prog should not be tailcalled.

cd tools/testing/selftests/bpf; ./test_progs -t tailcalls
337/25  tailcalls/tailcall_freplace:OK
337/26  tailcalls/tailcall_bpf2bpf_freplace:OK
337     tailcalls:OK
Summary: 1/26 PASSED, 0 SKIPPED, 0 FAILED

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Leon Hwang <leon.hwang@linux.dev>
Link: https://lore.kernel.org/r/20241015150207.70264-3-leon.hwang@linux.dev


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