Merged requested to merge er433/fix/build_context into dev
When running the testing framework, files are type-checked one by one. This contrasts with
compile contract, where all the files are aggregated at
ast_core level and then type-checked once. The situation makes loading contracts in the testing framework slower than it could be (@melwyn95 reported such a case in #ligo-test).
This MR fixes the issue by making the testing framework use the same function as
has a changelog entry