This patch fixes the column symbol resolution when creating a breakpoint
with the `move_to_nearest_code` flag set.
In order to achieve this, the patch adds column information handling in
the `LineTable`'s `LineEntry` finder. After experimenting a little, it
turns out the most natural approach in case of an inaccurate column match,
is to move backward and match the previous `LineEntry` rather than going
forward like we do with simple line breakpoints.
The patch also reflows the function to reduce code duplication.
Finally, it updates the `BreakpointResolver` heuristic to align it with
the `LineTable` method.
rdar://73218201
Differential Revision: https://reviews.llvm.org/D101221
Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>
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