Closes vitejs#4439

More context:
  vitejs#10504

Bug introduced in vitejs#10683

Some packages use "require" instead of "default" for CJS entry

…in the `getInlineConditions` function.

…and avoid breaking certain `tryFsResolve` calls too (like with `es5-ext`)

The "{id}/package.json" lookup done by `resolvePackageData` is insufficient for certain edge cases, like when "node_modules/{dep}" is linked to a directory without a package.json in it. With this PR, you can now import any file from node_modules even if it has no package.json file associated with it. This mirrors the same capability in Node's resolution algorithm.

In addition to supporting more edge cases, this new implementation might also be faster in some cases, since we are doing less lookups than compared to the previous behavior of calling `resolvePackageData` for every path in the `possiblePkgIds` array.

https://nodejs.org/api/packages.html#subpath-imports