GH-45063: [C++] Update bundled Abseil and gRPC

[raulcd]

Rationale for this change

What changes are included in this PR?

Are these changes tested?

Are there any user-facing changes?

• GitHub Issue: [C++] Update bundled Abseil and gRPC #45063

[github-actions]

⚠️ GitHub issue #45063 has been automatically assigned in GitHub to PR creator.

[raulcd]

@github-actions crossbow submit test-ubuntu-20.04-cpp-bundled

[raulcd]

I seem to be facing the same issue as:
grpc/grpc#33887

-- stderr output is:
In file included from /build/cpp/grpc_ep-prefix/src/grpc_ep/src/compiler/config_protobuf.h:22,
                 from /build/cpp/grpc_ep-prefix/src/grpc_ep/src/compiler/config.h:24,
                 from /build/cpp/grpc_ep-prefix/src/grpc_ep/src/compiler/csharp_generator.h:22,
                 from /build/cpp/grpc_ep-prefix/src/grpc_ep/src/compiler/csharp_generator.cc:19:
/build/cpp/grpc_ep-prefix/src/grpc_ep/include/grpcpp/impl/codegen/config_protobuf.h:81:10: fatal error: absl/status/status.h: No such file or directory
   81 | #include "absl/status/status.h"
      |          ^~~~~~~~~~~~~~~~~~~~~~

[github-actions]

Revision: bc93d48

Submitted crossbow builds: ursacomputing/crossbow @ actions-56b96cfd95

Task	Status
test-ubuntu-20.04-cpp-bundled

[raulcd]

Those three weren't picked by the command but were necessary to build

[raulcd]

I had to add those to avoid a bunch of those:

/build/cpp/grpc_ep-prefix/src/grpc_ep/src/core/lib/promise/party.h: In member function 'grpc_core::Poll<typename grpc_core::promise_detail::OncePromiseFactory<void, F>::Promise::Result> grpc_core::Party::PromiseParticipantImpl<SuppliedFactory>::PollCompletion() [with SuppliedFactory = grpc_core::ForwardCall(grpc_core::CallHandler, grpc_core::CallInitiator, absl::lts_20240722::AnyInvocable<void(grpc_metadata_batch&)>)::<lambda()> mutable::<lambda(std::optional<std::unique_ptr<grpc_metadata_batch, grpc_core::Arena::PooledDeleter> >)> mutable::<lambda()> mutable::<lambda(grpc_core::MessageHandle)> mutable::<lambda()>]':
/build/cpp/grpc_ep-prefix/src/grpc_ep/src/core/lib/promise/party.h:284:5: warning: control reaches end of non-void function [-Wreturn-type]
  284 |     }
      |     ^

[kou]

Abseil: Let's migrate to FetchContent from ExternalProject. We don't want to maintain Abseil dependencies manually...

[raulcd]

Abseil: Let's migrate to FetchContent from ExternalProject. We don't want to maintain Abseil dependencies manually...

Sounds good to me, probably worth waiting to upgrade CMake then as there were a lot of additions / improvements around FetchContent around CMake 3.24.