Sync from abseil/abseil-cpp

[aslam9691]

upgrade the spm and added automation script for the future release
Sync from https://github.com/abseil/abseil-cpp/releases/tag/20260526.0

[gemini-code-assist]

Code Review

This pull request introduces significant updates across the Abseil codebase, including the addition of new container types chunked_queue, linked_hash_map, and linked_hash_set, modernization of various utilities to use standard C++17/C++20 features (such as std::optional, std::variant, and std::source_location), and performance optimizations in hashing using hardware-accelerated CRC32 and AES instructions. It also refactors SymbolDecorator to be class-based and updates stack tracing and spinlock implementations. Feedback on the changes points out a redundant file exclusion in Package.swift where certain files are listed twice.

[aslam9691]

@ncooke3 @cherylEnkidu Please review.

[aslam9691]

@cherylEnkidu @ncooke3 Could you please review and merge this PR? It is currently blocking our gpc-iOS release.