Release v1.2.4.12 (#4699)

Changelog:
- Add support for new platform property annotations for P4Runtime. (4611) [Jonathan DiLorenzo]
- Fix extern pipeline name in template file (4675) [Komal Jain]
- Add a release template to the compiler. (4692) [Fabian Ruffy]
- irgen: Generate explicit instantiations (4681) [Chris Dodd]
- Workaround for gcc-11.4/draft 2x spec flaw (4679) [Chris Dodd]
- Remove no-longer-used *.p4info.txt files (4687) [Andy Fingerhut]
- Improve  internals (4678) [Anton Korobeynikov]
- Make the new operator protected for some IR types. (4670) [Fabian Ruffy]
- Set type for LAnd, LOr, LNot to be Type_Boolean if unknown. (4612) [Fabian Ruffy]
- Facilitate inheritance from RenameSymbols pass, deduplicate code (4682) [Vladimír Štill]
- Add string_view and string conversion operators and functions to cstring (4676) [Vladimír Štill]
- Generalization & minor refactoring in RenameMap (4677) [Vladimír Štill]
- Added changes for default hit actions for tc backend (4673) [Sosutha]
- Support for Register Extern in P4TC (4671) [Komal Jain]
- Aggressively clean up the Protobuf CMake dependency. (4543) [Fabian Ruffy]
- RemoveUnusedDeclarations - make helpers protected (4668) [Chris Dodd]
- Replace IR::getBitType with IR::Type_Bits::get. (4669) [Fabian Ruffy]
- Only emit the warning on EXPORT_COMPILE_COMMANDS when there are clang-tidy files to lint. (4665) [Fabian Ruffy]
- Explicitly include hash for Ubuntu 18.04. (4664) [Fabian Ruffy]
- Changes for for loops (4562) [Chris Dodd]
- [4656] Explicitly delay constant folding of only action enum   expressions, instead of delaying constant folding of all  expressions (4657) [Kyle Cripps]
- Link against the Boehm-Demers-Weiser Garbage Collector using FetchContent. (3930) [Fabian Ruffy]
- Merge TestgenCompilerTarget into TestgenTarget. (4650) [Fabian Ruffy]
- Add support for a clang-tidy linter. Add a files utility function. (4254) [Fabian Ruffy]
- Fixes to lib/hash and lib/big_int_util. (4655) [Fabian Ruffy]
- Change parameter for kfunc 'bpf_p4tc_entry_create_on_miss' (4637) [Komal Jain]
- Fix missing declaration of custom externs in the generated eBPF/uBPF header file. (4644) [Fabian Ruffy]
- Improve error message when shifting int by non-const (4653) [Vladimír Štill]
- Move IRUtils Literal get functions to the respective IR members. Add stringliteral get function.  (4623) [Fabian Ruffy]
- Use check_include_file_cxx instead of check_include_file to find mm_malloc.h (4649) [Fabian Ruffy]

Co-authored-by: fruffy <[email protected]>

Version.txt

@@ -1 +1 @@
-1.2.4.11
+1.2.4.12