C++: Update expected test results and compiler version documentation after frontend update

[jketema]

No description provided.

[Copilot]

Pull Request Overview

Updates expected test outputs after a frontend update and bumps documented compiler support in the C/C++ reference.

• Bump Clang extensions to version 19.1.0 and GNU extensions to GCC 15.0 in supported compilers docs
• Refresh various .expected test outputs to align with new AST/IR formatting and values
• Extend funcdname.ql with an additional regexpReplaceAll and adjust formatting for readability

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
docs/codeql/reusables/supported-versions-compilers.rst	Updated Clang/GCC version numbers
cpp/ql/test/library-tests/templates/nontype_instantiations/general/test.expected	Adjusted source locations and printed values
cpp/ql/test/library-tests/ir/range-analysis/SimpleRangeAnalysis_tests.cpp	Added overflow annotations to range assertions
cpp/ql/test/library-tests/ir/ir/raw_ir.expected	Renumbered IR entries for constant and store ops
cpp/ql/test/library-tests/ir/ir/aliased_ir.expected	Updated IR numbering and load/store references
cpp/ql/test/library-tests/ir/ir/PrintAST.expected	Aligned multi-line AST print output
cpp/ql/test/library-tests/funcdname/funcdname.ql	Broke long select into lines and added a regex step
cpp/ql/test/library-tests/funcdname/funcdname.expected	Updated expected mangled name with new prefix
cpp/ql/test/examples/expressions/PrintAST.expected	Adjusted printed literal from 1 to 5