This commit is a refactor of how the test suite in this repository is
specified. Previously an all-encompassing `testcase.sh` script would run
all tests and assert various properties using various scripts and files
that were present throughout the test suite. This has a number of
downsides:
* With CMake configuration it's not a fan of using `glob` to discover
tests.
* Using scripts is generally not that portable as commands can differ
between platforms or be missing entirely (e.g. Windows).
* The current "filter" scripts are pretty brittle and often need changes
with newer Wasmtime versions. For example some tests don't pass with
more recent Wasmtime versions due to output changes.
Instead tests are now specified manually in `CMakeLists.txt` rather than
globbed up, and various options are plumbed through to CTest in CMake.
This makes the tests literally just a single invocation of `wasmtime`
where CTest has various assertions about the result of the process
execution after-the-fact. This gets all tests passing with the latest
version of Wasmtime and additionally updates CI as well.
Alex Crichton
dde480ab28