Log Message:
protobuf py-protobuf: updated to [5.]27.0

Protocol Buffers v27.0

Compiler

Future-proof edition 2023 against feature value support windows. (fea6847)
Mark deleted fields in descriptor.proto reserved (d2da463)
Add extension declarations for known features. (f8d0a5b)
Refactored the Java generator into separate packages and targets. (bd81fd9)
Officially release Editions in 27.0. (baa83b6)
Define lifetimes of edition 2023 features (77f62de)
Implement feature lifetime validation in protoc and the C++ runtime. (b3b4497)
Add edition lifetime options for feature specs. (b09b3e4)
Enable editions support for Java Lite. (500c953)
Release edition defaults CLI arguments. (7a0e10e)
Update protoc release to include editions language features protos for Java and \ 
C++ (6483c47)

C++

Future-proof edition 2023 against feature value support windows. (fea6847)
Prohibit using features in the same file they're defined in. (8c5f3a7)
Fix validation checks of implicit presence. (bdf6b10)
Clarify map behaviors in editions. (61c9187)
Ensure we allocate overaligned types with aligned operator new. (11ef0ff)
Fix text-format delimited field handling.(29c69ff)
In debug mode, after clearing oneof messages on arenas, poison them if ASAN. \ 
(8826baf)
Allow string_type for Edition 2023. (d8251eb)
Breaking change: Ensure we allocate overaligned types with aligned operator new. \ 
(11ef0ff)
Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set
Move java_features.proto to java/core/srce/main/resources (274bc7f)
Add an RAII namespace printer helper for C++ codegen. (8599ab5)
Enable editions support for Java Lite. (500c953)
Add an RAII ifndef helper for C++ codegen. (1087274)
Clear oneof message fields even on arena on non-OPT builds. (5c183bd)
Implement edition 2023 support in all Ruby runtimes. (bca8fb6)
Release edition defaults CLI arguments. (7a0e10e)
Deprecate Arena::CreateMessage for OSS. (d4bfe52)
Open sourcing reflection_visit_fieds. (cfc07df)
Fixed the use of c++ keywords within namespace names
Fix pkg-config metadata for shared abseil on windows
Add GetStringView() and GetRepeatedStringView() with scratch. (a3f5af0)
Avoid a 'may be used uninitialized' warning when built with '-c opt'.
Add software prefetch to ByteSizeLong (948ca2e)
Add prefetching in arena blocks. (9e57b8e)
Rename the includingDefaultValueWithoutPresenceFields and \ 
always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the \ 
C++, Py and Java JSON serializers for consistency. (7d43131)
Remove tags for arena cleanup nodes now that we have dedicated string cleanup \ 
blocks. (202b106)
Avoid unused-parameter warning in field accessor listeners. (f4d5c2c)
Add new always_print_without_presence_fields option to the C++ JSON serializer. \ 
(671b61b)
Fail to build descriptor if ctype is specified for non string/bytes fields (8b4c7a1)
Check ctype() in DescriptorBuilder for edition 2023 and beyond. (307aeac)
Fail building descriptors if ctype is used for fields other than string or \ 
bytes. (403e207)
Fix generation of HasExtension and ExtensionSize functions to restrict to the \ 
(9f5be07)
Add the privacy manifest to the C++ CocoaPod.

Python

Add temporary alias for system_python.bzl at previous location .
Implement feature lifetime validation in protoc and the C++ runtime. (b3b4497)
Fix text-format delimited field handling (29c69ff)
Python JSON parser: Ignore invalid enum string values if ignore_unknown_fields is set
Fix upb python: DO NOT create empty optional field after sorting empty repeated \ 
field (7cf0238)
Enable Protobuf Python version check. (0442ed6)
Register Scalar/MessageMapContainerTypes as virtual subclasses of MutableMapping \ 
instead of inheriting directly. (5b32936)
Rename the includingDefaultValueWithoutPresenceFields and \ 
always_print_without_presence_fields to alwaysPrintFieldsWithNoPresence in the \ 
C++, Py and Java JSON serializers for consistency. (7d43131)
Add new including_default_value_without_presence_fields to Python JSON \ 
serializer. (25c6d34)
Adhere to PEP 8