Added a line to clear the memoization cache before setting up the mock

[wowi42]

The issue was that the test_get_sftp_fail test was failing because of a memoization cache problem. The get_file_transfer_connection method in the SSH connector is decorated with @memoize, which caches the result of the method call. When running multiple tests, if the method was successfully called in a previous test, it would return the cached result instead of executing again and potentially raising the expected SSHException

• Pull request is based on the default branch (3.x at this time)
• Pull request includes tests for any new/updated operations/facts
• Pull request includes documentation for any new/updated operations/facts
• Tests pass (see scripts/dev-test.sh)
• Type checking & code style passes (see scripts/dev-lint.sh)

[Fizzadar]

🎉 🎉 🎉 thank you for tracking this down @wowi42! Been a total pain to get rid of all the CI wonkiness caused by this, glad you found what is hopefully the last case!