Allows writing named sub-tests. These are:
1. Filterable on the command line via `cargo test ...`
2. Run in parallel
3. Use a fresh temp and deno dir for each test (unlike steps)
This commit updates our testing npm registry to handle
additional `@denotest2` scope in addition to `@denotest`
scope. I might have to update it further in the future to handle
additional scopes, but it's good enough for now.
Part of #22607 (probably closes it, but I haven't done thorough testing)
Makes it so that `require.resolve` with `paths` specified will fallback
to using the global cache when the paths can't be found when using a
global cache (not when using a node_modules folder)
