Avoid deadlocks for mysql and mariadb when creating a Nth locale

[petersg83]

What does it do?

Remove the use of temporary tables for mysql dialect for the inverse order usecase

Why is it needed?

It was forgotten in this PR : #15143

How to test it?

Run the test packages/plugins/i18n/tests/content-manager/crud.test.api.js multiple times with mysql and see that it always passes.

Related issue(s)/PR(s)

#15143

[codecov]

Codecov Report

Base: 59.94% // Head: 59.94% // No change to project coverage 👍

Coverage data is based on head (0413f27) compared to base (ab66578).
Patch coverage: 0.00% of modified lines in pull request are covered.

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #15197   +/-   ##
=======================================
  Coverage   59.94%   59.94%           
=======================================
  Files        1350     1350           
  Lines       32838    32838           
  Branches     6265     6265           
=======================================
  Hits        19685    19685           
  Misses      11299    11299           
  Partials     1854     1854           

Flag	Coverage Δ
back	50.14% <0.00%> (ø)
front	64.40% <ø> (ø)
unit_back	50.14% <0.00%> (ø)
unit_front	64.40% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...e/database/lib/entity-manager/regular-relations.js	10.09% <0.00%> (ø)

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[jhoward1994]

Aha I wondered what was going on with this test. Looks good

[petersg83]

Thank you with for the review!