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If during Crostini installation default Crostini container is failed to be
configured, removes Crostini at all so that "Retry" button installs
Crostini from the very beginning and Terminal app icon is not available
in a Chrome OS launcher.

Test: unit_tests --gtest_filter="Crostini*"
Bug: 1022784
Change-Id: I8d8c45cf6c39593657963786c117d384a6cecf9a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1917202
Commit-Queue: Olya Kalitova <okalitova@chromium.org>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Cr-Commit-Position: refs/heads/master@{#720199}