Add deduplication logic for selected items in CompareFilter component

[AlejandroPerezMartin]

Changes proposed in this Pull Request:

The Programs Comparison filter allows duplicate program selections, leading to console errors when trying to compare as well as duplicates in the selected filters. This PR filters the response from the Woocommerce Search component and removes duplicated items.

Closes https://linear.app/a8c/issue/GOOWOO-314/duplicate-programs-can-be-selected-in-the-comparison-filter-causing

Replace this with a good description of your changes & reasoning.

Screenshots:

Detailed test instructions:

1. Navigate to the Reports → Programs tab.
2. Click on the Programs filter and choose the Comparison filter.
3. Use the search input to select a campaign.
4. Search again and select the same campaign (duplicate)
5. Ensure no duplicate filters are added to the list below
6. Click the Compare button.
7. Observe there's no error in the browser console

Additional details:

Changelog entry

Fix duplicated values in the report comparison filters

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 67.7%. Comparing base (dd249e1) to head (488e302).

Additional details and impacted files

@@             Coverage Diff              @@
##             develop   #3253      +/-   ##
============================================
+ Coverage       66.8%   67.7%    +1.0%     
============================================
  Files            867     360     -507     
  Lines          26180    5866   -20314     
  Branches        1466    1466              
============================================
- Hits           17479    3973   -13506     
+ Misses          8528    1720    -6808     
  Partials         173     173              

Flag	Coverage Δ
js-unit-tests	67.7% <ø> (ø)
php-unit-tests	?

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[asvinb]

Thanks @AlejandroPerezMartin . Changes LGTM!