The previous version of the procedure could miss breakpoints when extra `EXTENDED_ARG` instructions are added before the injected code. This happened because in some corner cases after updating the opcodes to lines mapping an `EXTENDED_ARG` instruction could land as the last instruction in a line, and the instruction which argument it extends - on another. This lead to the situation when it was impossible to detect that we have hit the next line. These changes also add the ability to trace opcodes when the `PYDEVD_TRACE_OPCODES` environment variable is set to `True` (available only for Cython) to ease the debugging of such cases in the future.
(cherry picked from commit 77399d3b7b2b9bc6aac1b85d59ae305500cb6ecb)
GitOrigin-RevId: 105bf9d3d2cc51a940b03b1cb11c07e97074048b
