lisa._assets.kmodules.sched_tp: Avoid using pahole --expanded_prefix

Remove the use of --expanded_prefix so that we can use a pahole version
closer to mainstream (we still require --expand_types_once, but it
should be easier to finish upstreaming).

Replace the effect of that option by a sed regex to rename all types,
then rename back the types we did not want to rename in the first place
(the ones listed in private_types.txt)