Added retry to CompressionUtil.OpenCreate to prevent failures during site export

[daguiler]

Fixes #3964

Summary

DNN creates the export zip files in App_Data\ExportImport folder, but it does not add all necessary files at once. It closes and re-opens the zip file many times to add additional files. So DFS detects that the zip file is no longer locked and it starts replication. But then DNN attempts to open it again to add more files, and fails. All of this is noticeable only on large sites.
Typically, replication takes just a few seconds, so I used the RetryableAction to add a simple retrial mechanism to CompressionUtil.OpenCreate(string) to prevent such files from being skipped during export.

Note

I'm targetting the release/9.7.0 branch because develop is currently missing some important commits.

1. if decision is to approve and include this fix in 9.7.0, then this PR can be merged as-is
2. if decision is to defer to next version, then:
   a) DO NOT MERGE right now
   b) wait until release/9.7.0 is merged into develop
   c) change this PR to target develop (it should not give any conflicts)
   d) merge

[mitchelsellers]

This is similar to how we handle things in the installer so approved!