[PHP] Add php generics to map and repeated fields

[s2x]

Should fix this #14666

Refactor PHP code for proto3 message handling

This commit enhances the PHP code generation for proto3 messages, specifically focusing on the generated docblock code for the map and repeated. The changes include improved IDE tips to boost development efficiency.

Before:

• The generated PHP code lacked clear type hints and documentation for map and repeated fields.

After:

• Added detailed type hints and doc comments for better IDE support.
• Added test for all map and repeated fields combination.

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[bshaffer]

This is a duplicate of #11734, I believe

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This PR is labeled inactive because the last activity was over 90 days ago. This PR will be closed and archived after 14 additional days without activity.

[googleberg]

Closing as duplicate of #11734