cache extract failure fails on invalidated symlinks

[mzihlmann]

Actual behavior If a folder is created from cache over an invalid symlink, kaniko fails to create the directory

Expected behavior Build behaves the same whether it's from scratch or from cache

To Reproduce

FROM ubuntu

RUN mkdir /test \
    && ln -s /test /link

RUN rm -rf /test /link \
    && mkdir /link

WORKDIR /app

note that this will only fail on the second build, when we try to unpack the cache. WORKDIR is used to invalidate the cache https://github.com/GoogleContainerTools/kaniko/issues/3340