refactor(phpstan): Remove deprecations related to execute\(\) method

[scyzoryck]

Q	A
Bug fix? (use the a.b branch)	[ ]
New feature/enhancement? (use the a.x branch)	[x]
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:

Hi! My first PR here.
Fixes for phpstan errors:

Call to deprecated method execute() of class Doctrine\DBAL\Query\QueryBuilder:  
Use {@see executeQuery()} or {@see executeStatement()} instead.                 

Steps to test this PR:

1. Run phpstan
2. Run automated tests.

[scyzoryck]

It looks like tests are now passing failing tests are now passing on my local. However I was unable to run all of them :(

[RCheesley]

Thanks for the PR @scyzoryck and welcome to the community!

I've set the automated test suite running, and will ping some of the developers to review your proposed changes!

[scyzoryck]

Thanks! I will rebase the branch & fix the last issues from tests later today :)

[codecov]

Codecov Report

Merging #12684 (ded6ca2) into 5.x (9906356) will decrease coverage by 0.01%.
The diff coverage is 48.41%.

@@             Coverage Diff              @@
##                5.x   #12684      +/-   ##
============================================
- Coverage     58.49%   58.49%   -0.01%     
  Complexity    33555    33555              
============================================
  Files          2177     2177              
  Lines        101591   101588       -3     
============================================
- Hits          59423    59420       -3     
  Misses        42168    42168              

Files Changed	Coverage Δ
...bundles/ChannelBundle/Entity/MessageRepository.php	19.56% <0.00%> (ø)
...undles/EmailBundle/Entity/StatDeviceRepository.php	0.00% <0.00%> (ø)
.../IntegrationsBundle/Sync/Helper/SyncDateHelper.php	44.18% <0.00%> (ø)
...es/LeadBundle/Entity/StagesChangeLogRepository.php	30.76% <0.00%> (ø)
app/bundles/LeadBundle/Entity/TagRepository.php	34.69% <0.00%> (ø)
...dles/LeadBundle/EventListener/ReportSubscriber.php	74.24% <0.00%> (ø)
app/bundles/LeadBundle/Form/Type/FilterTrait.php	25.53% <0.00%> (ø)
app/bundles/LeadBundle/Model/ListModel.php	63.36% <0.00%> (ø)
...tificationBundle/Entity/NotificationRepository.php	10.67% <0.00%> (ø)
...ndles/NotificationBundle/Entity/StatRepository.php	0.00% <0.00%> (ø)
... and 69 more

[mabumusa1]

I love this PR, it is good to go.

It was on my pipeline but never had the time to do it.

Thanks @scyzoryck this is a very strong start, we hope we can get more contribution from you

[mabumusa1]

@scyzoryck Please fix CS fixer then we are good to go, I will ask others to review this PR

[scyzoryck]

Thanks for feedback. Rebased & code style fixed. I need to finish setting up environment with docker to have all tests working on my local. :)
I know it is a lot of changes in different files, but I had no idea how to approach it in the most easy way for code review. If you have any suggestion for the future contributions, let me know!

Best, scyzoryck.

[escopecz]

I went through the code changes and confirmed that the executeQuery method is used for select queries and executeStatement method for the insert, update and delete queries.

Since this PR touches every part of Mautic we must trust our test suite to scream if there is something wrong. And it's not screaming, so approving 👍