Fixes #38056 - Refresh content count action fails when count is set to {}

[sjha4]

What are the changes introduced in this pull request?

Add check for smart proxy content_count being {}

Considerations taken when implementing this change?

We were handling the nil case but not empty? case, i.e {}
Added empty checks for content_counts in 2 places.
One for content_counts where we reinitialize it to { content_view_versions: {} } and for repositories where we need to handle content_counts[:content_view_versions][repo.content_view_version_id.to_s].empty?

What are the testing steps for this pull request?

In the console,

sp = SmartProxy.find("id")
sp.content_counts = {}
sp.save!

Try refresh counts action against any env/cv or global and the content count task will fail.

If you have some content_counts populated, pick any cv_version_id,
You can also try to test the empty hash case for cv version id keys.
Example:
sp.content_counts["content_view_versions"]["8"] = {}

Run refresh action for that cv_version from UI and see that it passes for this PR but fails without the PR.

[vsedmik]

Tested downstream in my snap 80 setup (curl <this> | git apply) with 2 CVs inside 2 LCEs and works well!

Tried both - reset the global and CVV-specific counts via rake console and update them back via CV-specific and LCE-specific kebab (the UI kebab).

In all cases I ended up with task successfully completed and counts correctly updated for the appropriate CV/LCE.

[chris1984]

Code looks fine, Vlad tested it