Add Generic Find/Replace Plugin for Restores

First of all, this is an incredible tool.

Issue: When restoring a backup onto a new cluster using e.g.,--namespace-mappings staging:staging-test or --namespace-mappings staging:staging, any ingress or LBs that are deployed will overwrite dns entries that are currently in place for the cloned cluster. This isn't necessarily undesirable (i.e., for disaster recovery), but it prevents ark from being used easily for cloning into new test environments. Is it possible to search and replace these resource specific fields and replace them with a value specified with e.g., --hosted-zone=test.example.com or --hosted-zone=staging-test.example.com?

I tried downloading the backup locally, unpacking it, and running sed replacements, but there were issues after restoring from the raw json via kubectl. I can't remember what the issues were, but I suspect it had to do with the ordering in which resources were created (I was pretty lazy in issuing a kubectl apply -f on all directories).

This may be something that cannot be easily resolved, but I thought it still worth asking. If not possible, the best method might be to exclude those resources and manually create them after a restore...I will test that as well.