Fix some more PHP 8.2 deprecations

[sgiehl]

Description:

Added some missing class attributes to avoid deprecation notices, applied some code formatting and simplifications.

refs #19343

Review

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• Wording review done
• Code review done
• Tests were added if useful/possible
• Reviewed for breaking changes
• Developer changelog updated if needed
• Documentation added if needed
• Existing documentation updated if needed

[bx80]

• Functional review done
• Potential edge cases thought about (behavior of the code with strange input, with strange internal state or possible interactions with other Matomo subsystems)
• Usability review done (is anything maybe unclear or think about anything that would cause people to reach out to support)
• Security review done
• n/a Wording review done
• Code review done
• n/a Tests were added if useful/possible
• None Reviewed for breaking changes
• n/a Developer changelog updated if needed
• n/a Documentation added if needed
• n/a Existing documentation updated if needed

[MatomoForumNotifications]

This pull request has been mentioned on Matomo forums. There might be relevant details there:

https://forum.matomo.org/t/deprecated-warning-after-update-from-4-12-3-to-4-13-1-should-be-reported-here/49324/2