perf testsuite probe: Add test for line semantics

The perf-probe command uses a specific semantics to describe probes.
Test some patterns that are known to be both valid and invalid if
they are handled appropriately.

This test is run as a part of perftool-testsuite_probe test case.

Signed-off-by: Veronika Molnarova <vmolnaro@redhat.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/20240702110849.31904-9-vmolnaro@redhat.com


Signed-off-by: Michael Petlan <mpetlan@redhat.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>