Previously, MetaInfResourceManager that we use with Undertow to serve
static resources from jar's META-INF/resources did not correctly
handle characters in the path that should be percent-encoded when
used in a URL.

This commit updates MetaInfResourceManager to encode the path before
it is used to create a URL. Prior to this encoding, encoded slashes
(%2F) are decoded as, unlike other encoded characters in the request's
URL, encoded slashes are not decoded prior to calling the
ResourceManager.

Fixes gh-17853