selftests/bpf: enable fsession_test on riscv64

selftests/bpf: enable fsession_test on riscv64

Now that the RISC-V trampoline JIT supports BPF_TRACE_FSESSION, run
the fsession selftest on riscv64 as well as x86_64.

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Tested-by: Björn Töpel <bjorn@kernel.org>
Acked-by: Björn Töpel <bjorn@kernel.org>
Link: https://lore.kernel.org/r/20260208053311.698352-4-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Pu Lehui <pulehui@huawei.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>