Add new report data source 'Focus stats'

[JonasLudwig1998]

Q	A
Bug fix? (use the a.b branch)	🔴
New feature/enhancement? (use the a.x branch)	🟢
Deprecations?	🔴
BC breaks? (use the c.x branch)	🔴
Automated tests included?	🟢
Related user documentation PR URL	mautic/user-documentation#...
Related developer documentation PR URL	mautic/developer-documentation-new#...
Issue(s) addressed	Fixes #...

Description

This PR adds an extra report data source called 'Focus Stats'.

There one can select the columns: name, url, interaction, page hits, unique hits, description, focus type, style

The report is meant to show statistics for page hits and unique hits for both your focus item views and clicks.

---

📋 Steps to test this PR:

1. Open this PR on Gitpod or pull down for testing locally (see docs on testing PRs here)
2. Create some focus stats data by:
   1. Creating multiple focus items
   2. Adding focus items to a landing page
   3. Open the landing pages in different incognito browser windows multiple times to add some views / views+clicks
3. Create a report with data source ‚focus stats‘ and select all columns
4. Check if all the data in the report corresponds to your behavior from 2.3 (you can also check in your database via the tables focus, focus_stats, channel_url_trackables, page_redirects)

[MadlenF]

Works as described from user perspective.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.23%. Comparing base (dfa51f4) to head (2ae0a3c).
Report is 1 commits behind head on 5.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                5.x   #14279      +/-   ##
============================================
+ Coverage     63.15%   63.23%   +0.08%     
- Complexity    34468    34569     +101     
============================================
  Files          2266     2271       +5     
  Lines        103129   103380     +251     
============================================
+ Hits          65130    65373     +243     
- Misses        37999    38007       +8     

Files with missing lines	Coverage Δ
...uticFocusBundle/EventListener/ReportSubscriber.php	100.00% <100.00%> (ø)

... and 12 files with indirect coverage changes

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