worktree push: do not push existing versions

[pmrowla]

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Closes #8354

• For files that already have version ID information from a previous push, if that version still exists on the remote we will not push a new version of that file (regardless of whether or not the "latest" version on the remote matches the one we want to push)
• Adds progress bars and fixes reported upload/download file count on worktree push/fetch

[codecov]

Codecov Report

Base: 94.22% // Head: 94.22% // No change to project coverage 👍

Coverage data is based on head (c69d318) compared to base (c69d318).
Patch has no changes to coverable lines.

❗ Current head c69d318 differs from pull request most recent head 106b86a. Consider uploading reports for the commit 106b86a to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8606   +/-   ##
=======================================
  Coverage   94.22%   94.22%           
=======================================
  Files         432      432           
  Lines       33056    33056           
  Branches     4631     4631           
=======================================
  Hits        31146    31146           
  Misses       1484     1484           
  Partials      426      426           

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