test/parseconf: Add failure cases in conf_failures/

These failure cases can be used to test the failure behaviour
and failure logs of test_parseconf.sh.

See the README for details.

Part of 32451.

src/test/conf_failures/README

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+This directory contains typical test_parseconf.sh failure cases.
+
+If these directories are copied into conf_examples, test_parseconf.sh will
+fail. Use these failure cases to make sure test_parseconf.sh handles failures
+correctly, and produces useful output.

src/test/conf_failures/fail-error-success/error

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+Tor

src/test/conf_failures/fail-error/error

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+no match

src/test/conf_failures/fail-error/torrc

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+bad bad bad

src/test/conf_failures/fail-expected-error/torrc

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+bad bad bad

src/test/conf_failures/fail-expected-log/expected_log

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+bad bad bad

src/test/conf_failures/fail-expected/expected

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+bad