Sms improvements

[escopecz]

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

Description:

This is an enhancement code that we needed to build a plugin that was adding some new tokens to SMS sending. It improves the code:

1. Reuses code that was already there and removes duplicates (the owner token handling)
2. Adds an extra SMS transport that can be used in tests. It simplifies some tests and enables testing the real sending without mocking.
3. More functional tests were added.

Steps to test this PR:

1. Open this PR on Gitpod or pull down for testing locally (see docs on testing PRs here)
2. Test that you can send SMS via Twilio and the tokens are being replaced correctly.

[dongilbert]

lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.78%. Comparing base (7f141f6) to head (f05b284).
Report is 2 commits behind head on 5.x.

Additional details and impacted files

@@             Coverage Diff              @@
##                5.x   #13743      +/-   ##
============================================
+ Coverage     61.51%   61.78%   +0.27%     
- Complexity    34068    34095      +27     
============================================
  Files          2241     2241              
  Lines        101852   101921      +69     
============================================
+ Hits          62651    62972     +321     
+ Misses        39201    38949     -252     

Files	Coverage Δ
...ndles/LeadBundle/EventListener/OwnerSubscriber.php	97.01% <100.00%> (+0.86%)	⬆️
app/bundles/PageBundle/Model/TrackableModel.php	77.95% <ø> (ø)
...les/PluginBundle/Form/Type/FeatureSettingsType.php	74.07% <100.00%> (ø)
.../bundles/SmsBundle/EventListener/SmsSubscriber.php	83.78% <100.00%> (+23.78%)	⬆️
app/bundles/SmsBundle/Form/Type/SmsType.php	0.00% <ø> (ø)

... and 42 files with indirect coverage changes