build: wasip1 is broken on wasmer runtime #59907
Description
This is a tracking issue for issues surrounding the use of the new wasip1 GOOS target on the wasmer Wasm runtime. We currently do not have a wasmer runner, but manual testing against the wasmer runtime has already yielded some results, namely, it is known that it exhibits a problem similar to wasmtime when it comes to opening directories (see #59583 (comment)).
This issue should not be considered done until we have a working wasmer runner and all tests are either passing or we have documented the failures which we cannot reasonably fix.
Currently known failing tests:
| Package | Test name | Error | Test log | Fixed |
|---|---|---|---|---|
| archive/tar | TestReader | open testdata/gnu.tar: Bad file number | Full log |