WT-13201 added a `sanitizer_long` label to csuite tests for tests that are slow when run under ASan, however the `vars` arguments passed into the test at the buildvariant level aren't being applied to the test. We also face an issue where the `-LE` flags in ctest behave as a logical AND rather than a logical OR, so the flags `-LE foo -LE bar` only filter tests with both labels, rather than tests with either label. These two limitations make it difficult to create an evergreen test that uses the correct labels in the correct combination of buildvariant and test.

This ticket removes the sanitizer_long tag and uses long_running instead. This means fewer csuite tests are run in `csuite-tests-fast` on our ubuntu variant, but is the cleanest solution that prevents timeouts on our ASan and TSan variants.