bpf: Allow bpf_res_spin_lock() in all contexts

There is no particular reason to keep bpf_res_spin_lock() disabled in
tracing programs, since it is safe against reentrancy and deadlocks.
Remove the restriction for tracing programs covered by the predicate
is_tracing_prog_type().

This is a prerequisite before the definition of is_tracing_prog_type()
is updated to include raw_tp, fentry, fexit, and fmod_ret. Existing
tracing programs will be updated to use bpf_res_spin_lock() instead when
it is available.

Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Emil Tsalapatis <emil@etsalapatis.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260719113551.1294284-2-memxor@gmail.com

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