GDB: format output for class entries and class constants (#15955)

For `zend_string` pointers in class entries, show the string contents (if not
`NULL`).

For class constants, the

GDB: format output for class entries and class constants (#15955)

For `zend_string` pointers in class entries, show the string contents (if not
`NULL`).

For class constants, the `ce` (class entry pointer) field is shown with the
name of the class, and the `doc_comment` field is shown with the string
contents if possible.

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Fix GH-15923: GDB: Python Exception <class 'TypeError'>: exceptions must derive from BaseException

Triggers on release builds when printing data structures.
You can't raise a string, you

Fix GH-15923: GDB: Python Exception <class 'TypeError'>: exceptions must derive from BaseException

Triggers on release builds when printing data structures.
You can't raise a string, you must raise exceptions.

Closes GH-15928.

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Inline GDB scripts in the PHP binary (#13600)

This inlines .gdbinit and php_gdb.py in the .debug_gdb_scripts section of the PHP binary so that GDB can auto-load them regardless of the curren

Inline GDB scripts in the PHP binary (#13600)

This inlines .gdbinit and php_gdb.py in the .debug_gdb_scripts section of the PHP binary so that GDB can auto-load them regardless of the current directory or the availability of the PHP source code (albeit some functionalities of php_gdb.py currently rely on the source being available).

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