Add a new assertion macro ut_asserteq_regex() that checks if a string
matches a regular expression pattern using the SLRE library.
This is useful for tests where exact string-matching is difficult, such
as when output contains line numbers or other variable content.
Use a helper function ut_check_regex() to avoid including slre.h in the
header.
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
8f8c862a7a