Track test configuration in test results

[loganek]

Some of the tests are configurable and therefore support for some of the features might be "hidden" because the test will pass, even though the feature isn't supported (e.g. https://github.com/WebAssembly/wasi-testsuite/blob/main/tests/rust/src/config.rs#L16). We should have a way to indicate whether a specific feature is supported for a given runtime on a specific operating system. Two options come to my mind:

• add the configuration to the test result itself
• split it into two tests and let runtimes skip tests that are not expected to work

Both approaches have pros and cons so I'm open for any suggestions from the community.