Sync remaining template files

[Togira123]

Notably, this removes two files that were both removed in upstream godot: search_array.hpp and thread_work_pool.hpp.
There are a few things that I'm unsure about still:

• thread_work_pool.hpp has been removed in upstream 4 years ago (here: Remove ThreadWorkPool, replace by WorkerThreadPool godot#63354), I'm not sure whether removing it in godot-cpp has just been forgotten or if there's a reason it's still here.

• godot-cpp/build_profile.py

  Lines 36 to 37 in 101ae38

  	# In include/godot_cpp/templates/thread_work_pool.hpp
  	front.append("Semaphore")

  This mentions the removed file, perhaps we can remove this line then, not sure whether that'd break other things though.
• I haven't synced spin_lock.hpp despite it being outdated because we'd have to access Thread::CACHE_LINE_BYTES which does not exist currently, so we'd either have to sync the threads file too or add it in generation and I'm not sure if we want to do either of those.
• I re-added the struct in hashfuncs.hpp I accidentally removed in my last PR, but if you prefer that I fully sync the file instead in this PR I can do that too.

[dsnopek]

Thanks!

• godot-cpp/build_profile.py

  Lines 36 to 37 in 101ae38

  	# In include/godot_cpp/templates/thread_work_pool.hpp
  	front.append("Semaphore")

  This mentions the removed file, perhaps we can remove this line then, not sure whether that'd break other things though.

I think you should remove those lines - I don't expect it to cause problems, and it would be nice to have fewer classes that are always enabled

Otherwise, skimming the changes here, they seem OK to me! I think it'd be fine to take out of draft