[5.3] Use str_starts_with function for libraries code

[joomdonation]

Pull Request for Issue # .

Summary of Changes

This PR uses StrStartsWithRector rule to convert our libraries code to use str_starts_with function. It does not change any existing behavior, just make the code cleaner and easier to read.

Testing Instructions

Need to have code review for every single change here.

Actual result BEFORE applying this Pull Request

Works

Expected result AFTER applying this Pull Request

Works, with cleaner, easier to read code.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[QuyTon]

I have tested this item ✅ successfully on e72ca72

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[viocassel]

I have tested this item ✅ successfully on e72ca72

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44915.}

[alikon]

RTC

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/44915.}

[HLeithner]

Code Review

[HLeithner]

thanks

[joomdonation]

Thank you everyone !