Context

remove some deadcode. Dune 3 generate empty mli for executables and tests allowing the compiler to complain about unused values.
plug some tests, there were splotted as deadcode by the compiler
remove our hack for running inline_tests in javascript. Dune 3 now allows to specify a custom alias for thoses.
drop the ppx_blob dependency (it doesn't work welll with dune 3), replaced by ocp-ocamlres that we use else where in the codebase.

Manually testing the MR

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Edited May 30, 2022 by Hugo Heuzard