Pass mauticTemplateVars to twig templates

[kuzmany]

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/mautic-documentation#...
Related developer documentation PR URL	mautic/developer-documentation#...
Issue(s) addressed	Fixes #...

Description:

Follow up of #12924

Seems like customContent twig function does not work because pass not existed mauticTemplateVars.

       ` {{ customContent('tabs.content', mauticTemplateVars|default([])) }}`

This PR inject mauticTemplateVars to twig templates, similar like we did in M4

Steps to test this PR:

1. Open this PR on Gitpod or pull down for testing locally (see docs on testing PRs here)
2. Just test your own subscriber to contact detail page tab content. After PR should work properly

  public static function getSubscribedEvents()
    {
        return [
            CoreEvents::VIEW_INJECT_CUSTOM_CONTENT => ['injectViewCustomContent', 0],
        ];
    }

    public function injectViewCustomContent(CustomContentEvent $customContentEvent): void
    {
        if ('tabs.content' == $customContentEvent->getContext()) {
            
        }
    }

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (bee6b30) 58.60% compared to head (da6a901) 58.60%.
Report is 4 commits behind head on 5.0.

Additional details and impacted files

@@             Coverage Diff              @@
##                5.0   #13257      +/-   ##
============================================
- Coverage     58.60%   58.60%   -0.01%     
  Complexity    32985    32985              
============================================
  Files          2183     2183              
  Lines         98756    98755       -1     
============================================
- Hits          57877    57875       -2     
- Misses        40879    40880       +1     

Files	Coverage Δ
...bundles/CoreBundle/Controller/CommonController.php	79.37% <100.00%> (+0.09%)	⬆️
...p/bundles/CoreBundle/Twig/Helper/ContentHelper.php	72.22% <100.00%> (-7.78%)	⬇️

[mabumusa1]

Tested, changes are correct

[kuzmany]

@mollux , please consider adding this to version 5.0.3. It blocks third-party plugins.

[escopecz]

I see no issue here 👍