[5.2.3] Removing deprecated access to User object attributes

[heelc29]

Summary of Changes

Re-apply updates from #43268 to new com_users dispatcher (5.2.3 security fix)

Testing Instructions

check https://github.com/joomla/joomla-cms/pull/43268/files#diff-65f728c437890b80fea358c8762fe7d25fecabb5ac63f200ba0409e874db0291

Actual result BEFORE applying this Pull Request

deprecated access to user object guest attribute

Expected result AFTER applying this Pull Request

no deprecated access to user object guest attribute

Link to documentations

Please select:

• No documentation changes for docs.joomla.org needed
• No documentation changes for manual.joomla.org needed

[alikon]

I have tested this item ✅ successfully on ed3a683

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[laoneo]

I have tested this item ✅ successfully on ed3a683

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[richard67]

@laoneo Not a good idea to update the branch so the human test counter is reset so when checking in the issue tracker for PRs in state "pending" which have 2 tests, the PR is not found. You should have set RTC before updating the branch, or restored the test results in the issue tracker after the branch update.

[richard67]

RTC

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[pe7er]

Thanks @heelc29 !