[4.x] Backport fix for Error in PrivacyConsent::getPrivacyItemId()

[SniperSister]

Summary of Changes

Backport changes from #41976 to 4.x branch

Testing Instructions

See original PR.

Actual result BEFORE applying this Pull Request

See original PR.

Expected result AFTER applying this Pull Request

See original PR.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• [x ] No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• [x ] No documentation changes for manual.joomla.org needed

[richard67]

I have tested this item ✅ successfully on 8d2374f

Tested by code review: The application object doesn't have a getTag method, but the language object has.

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43445.}

[Quy]

I have tested this item ✅ successfully on 8d2374f

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43445.}

[Quy]

RTC

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43445.}

[MacJoom]

Thank you!