use ALIGN for Push::alignment in struct types #6387

Job	Run time
Build Android (on Linux)	3m 23s
Build Benchmarks (on Linux) (g++-13)	3m 17s
Build Dart	1m 23s
Build Windows C++ (11)	3m 14s
Build Windows C++ (14)	3m 38s
Build .NET Windows	30s
Check Generated Code (g++-13)	1m 9s
Check Generated Code on Windows	3m 46s
Build Windows C++ (17)	4m 2s
Build .NET Windows (-p:UnsafeByteBuffer=true)	1m 4s
Check Generated Code (clang++-18)	1m 18s
Build Windows C++ (20)	5m 59s
Build Go	1m 29s
Build Java	15s
Build Windows C++ (23)	5m 45s
Build Kotlin Linux	3m 18s
Build Kotlin MacOS	4m 20s
Build Linux (g++-13)	2m 8s
Build Linux C++ (11, g++-13)	2m 5s
Build Linux with -DFLATBUFFERS_NO_FILE_TESTS	2m 8s
Build Linux (clang++-18)	2m 1s
Build Linux with out-of-source build location	1m 13s
Build Linux C++ (11, clang++-18)	2m 5s
Build Mac (for Intel)	2m 4s
Build Linux C++ (14, g++-13)	2m 17s
Build Nim	1m 17s
Build Mac (universal build)	3m 10s
Build Linux C++ (14, clang++-18)	2m 5s
Build PHP	1m 6s
Build Linux C++ (17, g++-13)	2m 12s
Build Python	1m 7s
Build Rust Linux	1m 54s
Build Linux C++ (17, clang++-18)	2m 15s
Build Linux C++ (20, g++-13)	2m 29s
Build Rust Windows	1m 15s
Build Swift (5.8)	1m 58s
Build Linux C++ (20, clang++-18)	2m 26s
Build Swift Wasm	2m 57s
Build Swift (5.9)	2m 11s
Build Linux C++ (23, g++-13)	2m 29s
Build TS	1m 27s
Build Swift (5.10)	2m 8s
Build Windows 2019	4m 47s
release-digests	0s
provenance	0s
	1h 43m 4s

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