Makes sanity job check match on expected output instead of string comparison

What does this MR do and why?

Currently

When the sanity-framework job runs, GitLab QA expects it to output the number of examples that ran/failed

This causes issues with adding new tests to sanity-framework as the expectation is hard coded

This MR

Changes the expectation to only match the number of failures.

This change should allow the sanity check to expect that a test failed, but doesn't have awareness of how many are passing.

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