feat: [PE-882] CGN new discounts count

[freddi301]

Short description

Replaced badge label of "novità" with actual new discounts count.

List of changes proposed in this pull request

• change label

How to test

• to test with dev-api-server you need feat: [PE-882] Add new discounts number io-dev-api-server#455
• login into the app
• go to carta giovani nazionale trough portafoglio (add the card if necessary)
• go to discount list by pressing "scopri opportunià"
• press "by partner" tab
• check that the badges contain numbers instead of a fixed label
• press "by category" tab
• press on any category
• check that the badges contain numbers instead of a fixed label

[github-actions]

Jira Pull Request Link

This Pull Request refers to the following Jira issue PE-882

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes missing coverage. Please review.

Project coverage is 40.50%. Comparing base (58557e7) to head (c995a8d).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
.../cgn/components/merchants/CgnMerchantsListView.tsx	0.00%	3 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (58557e7) and HEAD (c995a8d). Click for more details.

HEAD has 4 uploads less than BASE

Flag	BASE (58557e7)	HEAD (c995a8d)
	9	5

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #6607      +/-   ##
==========================================
- Coverage   46.97%   40.50%   -6.47%     
==========================================
  Files        1550     1410     -140     
  Lines       32003    29809    -2194     
  Branches     7232     6732     -500     
==========================================
- Hits        15033    12075    -2958     
- Misses      16935    17703     +768     
+ Partials       35       31       -4     

Files with missing lines	Coverage Δ
.../cgn/components/merchants/CgnMerchantsListView.tsx	11.11% <0.00%> (-5.56%)	⬇️

... and 513 files with indirect coverage changes

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[LeleDallas]

Works as expected, pay attention to that edge case