Currently, these breakpoints are being accumulated every time a new
process if created (e.g. through a `run`). Depending on the
circumstances, the old breakpoints are even left enabled, interfering
with subsequent processes. This is addressed by removing the breakpoints
in ProcessGDBRemote::Clear
Note that these breakpoints are more of a PlatformDarwin thing, so in
the future we should look into moving them there.
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