Release v20250220003621-3c4d4d8481-almalinux8-x86_64-clang19-full-lto

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003621-3c4d4d8481-almalinux8-x86_64-clang17-full-lto

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003619-3c4d4d8481-almalinux8-x86_64-gcc12

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003614-3c4d4d8481-ubuntu2404-x86_64-clang17

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003611-3c4d4d8481-almalinux9-x86_64-gcc12

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003607-3c4d4d8481-almalinux9-x86_64-gcc13

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003605-3c4d4d8481-ubuntu2404-x86_64-gcc13

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003605-3c4d4d8481-almalinux9-x86_64-clang19

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003604-3c4d4d8481-ubuntu2204-x86_64-clang19

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.

Release v20250220003549-3c4d4d8481-ubuntu2204-x86_64-gcc12

Bump protobuf to 21.12 (#302)

Protobuf 22+ drops support for autotools build and requires changes to
how we build protobuf, so just bumping to 21.12 first.