Test tree-sitter c++ parser

[aryx]

This will help #1952

test plan:
pad@yrax:~/work/lang-cpp/Cataclysm-DDA$ yy -lang cpp -test_parse_tree_sitter .

• /home/pad/semgrep/build/default/cli/Main.exe -lang cpp -test_parse_tree_sitter .
  11 / 852/OVERLOAD/work/lang-cpp/Cataclysm-DDA/src/activity_actor.cpp: exn = Tree_sitter_run.Tree_sitter_error.Error()
  ...

NB total files = 852; NB total lines = 474254; perfect = 662; pbs = 190; timeout = 0; =========> 77%
nb good = 174878, nb passed = 0 =========> 0.000000%
nb good = 174878, nb bad = 299376 =========> 36.874333%

For comparison, the C++/C/cpp parser in pfff is doing:
NB total files = 852; NB total lines = 473336; perfect = 110; pbs = 742; timeout = 0; =========> 12%
nb good = 160267, nb passed = 187 =========> 0.116680%
nb good = 160267, nb bad = 313069 =========> 33.859035%
pad@yrax:~/work/lang-cpp/Cataclysm-DDA$

[aryx]

@mjambon I tried to use lang-stat in ocaml-tree-sitter but I didn't manage to compile in the ocaml-tree-sitter/lang/ directory.
Got some errors about git repositories and kotlin.

[aryx]

ah sorry, it works now! I forgot 'make update' to get the kotlin submodule.

Now I get an error about npx though.
Generate parser in .
/bin/sh: 4: npx: not found

I tried make setup, but got some permissions errors. I had to chown pad /usr/local/lib and /usr/local/bin. and rm /usr/loca/bin/npx with a sudo.

[mjambon]

ok, great!