Add fuzz inputs

[maflcko]

C.f. last one: #202

mv fuzz_corpora fuzz_inputs_moved
../bitcoin-core/bld/test/fuzz/test_runner.py -l DEBUG --par $( nproc ) --m_dir ./fuzz_inputs_moved/  --m_dir ./results_from_working_farm --m_dir ../etc/... ./fuzz_corpora
git restore -- ./fuzz_corpora
git add ./fuzz_corpora
git commit -m "Add fuzz inputs"

[maflcko]

(This time there are also some cross-pollinate commits for freshly added fuzz targets)

[maflcko]

main: https://drahtbot.space/host_reports/DrahtBot/reports/coverage_fuzz/monotree/804675930598ccd3/757a13d6981ab59d/fuzz.coverage/index.html
this pull: https://drahtbot.space/host_reports/DrahtBot/reports/coverage_fuzz/monotree/804675930598ccd3/46bdefd522f9cfe6/fuzz.coverage/index.html

[maflcko]

i'll follow-up with the ci failures later