perf testsuite: Add common output checking helpers
As a form of validation, it is a common practice to check the outputs of commands whether they contain expected patterns or match a certain regex. Add helpers for verifying that all regexes are found in the output, that all lines match any pattern from a set and that a certain expression is not present in the output. In verbose mode these helpers log mismatches for easier failure investigation. Signed-off-by: Veronika Molnarova <vmolnaro@redhat.com> Signed-off-by: Michael Petlan <mpetlan@redhat.com> Cc: kjain@linux.ibm.com Cc: atrajeev@linux.vnet.ibm.com Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: https://lore.kernel.org/r/20240215110231.15385-6-mpetlan@redhat.com
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