Backport '[clang] static operators should evaluate object argument (reland)' to release/18.x (llvm#80109)

Cherry picked from commit ee01a2c.

Closes llvm#80041, backport llvm#80108.

Co-authored-by: Shafik Yaghmour <[email protected]>
Co-authored-by: cor3ntin <[email protected]>
Co-authored-by: Aaron Ballman <[email protected]>

Author: 4 people

clang/docs/ReleaseNotes.rst

@@ -382,6 +382,9 @@ Bug Fixes to C++ Support
 - Fix a crash when using ``source_location`` in the trailing return type of a lambda expression. (#GH67134)
 - A follow-up fix was added for (#GH61460), as the previous fix was not entirely correct. (#GH86361)
 
+- Fix incorrect code generation caused by the object argument of ``static operator()`` and ``static operator[]`` calls not being evaluated.
+  Fixes (`#67976 <https://github.com/llvm/llvm-project/issues/67976>`_)
+
 Bug Fixes to AST Handling
 ^^^^^^^^^^^^^^^^^^^^^^^^^