Fix db convert directly calling abstract function

[mattlorimer]

Description

#8129 introduced a direct call to an abstract database function, this PR correct it to call the function on the instantiated db object, addressing multiple issue introduced in 7.10.24/7.11.12

Motivation and Context

How To Test This

See home page charts, trimTracker Scheduled Task and everywhere else that uses this function now works as expected

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Final checklist

• My code follows the code style of this project found here.
• My change requires a change to the documentation.
• I have read the How to Contribute guidelines.

[codecov-io]

Codecov Report

Merging #8594 into hotfix-7.10.x will not change coverage.
The diff coverage is 14.39%.

@@              Coverage Diff               @@
##           hotfix-7.10.x    #8594   +/-   ##
==============================================
  Coverage          10.73%   10.73%           
==============================================
  Files               3229     3229           
  Lines             240855   240855           
==============================================
  Hits               25858    25858           
  Misses            214997   214997

[pgorod]

Thanks Matt. This should also fix #8577, right?

[connorshea]

🙈 sorry I caused this issue, thanks for fixing it!

[pgorod]

This still needs some more fixing...

https://community.suitecrm.com/t/fehlermeldung-rechnungs-versandadresse-kopieren/72422

It's in German, but you can see all in you need form the stack trace in English.

The complete fix would be, I think

• make a list of the functions that Connor's PR changed
• go in DBManager and check each of them to see if they use $this inside them
• for all those functions, make a fix similar to Matt's here: add object instantiation to the original call.