Closes #6394: Reintroduce limit preload at job level

[Miraeld]

Description

Re-introduction of the preload limit at the job level

Fixes #6394

Type of change

• Enhancement (non-breaking change which improves an existing functionality).

Is the solution different from the one proposed during the grooming?

No

Checklists

Generic development checklist

• My code follows the style guidelines of this project, with adapted comments and without new warnings.
• I have added unit and integration tests that prove my fix is effective or that my feature works.
• The CI passes locally with my changes (including unit tests, integration tests, linter).
• Any dependent changes have been merged and published in downstream modules.
• If applicable, I have made corresponding changes to the documentation. Provide a link to the documentation.

Test summary

• I triggered all changed lines of code at least once without new errors/warnings/notices.
• I validated all Acceptance Criteria of the related issues. (If applicable, provide proof).
• I validated all test plan the QA Review asked me to.

[Mai-Saad]

Related test plan https://wpmediaqa.testrail.io/index.php?/runs/view/808&group_by=cases:section_id&group_order=asc
Note: will be nice to do a performance check vs trunk with a big batch size

[jeawhanlee]

During test plan execution, When helper plugin is used: https://drive.google.com/uc?id=1JDqh9xV6zyLcD3OR_Njsxn8KW_PYGoac with webp enabled in addon, only webp versions are generated. Same thing is happening on trunk but working fine on 3.12.3 with no webp version generated.