Update actions/checkout action to v7 #32270

Job	Run time
validate-workflow-yaml	6s
lint-toml	7s
Python (lint)	34s
Python (test)	2m 13s
Check build with minimal dependencies	1m 59s
Rust (lint)	2m 4s
Java	2m 26s
Rust build (default features)	2m 16s
C API test build	35s
Check generated source files are up to date	37s
Rust (docs)	2m 11s
Rust tests (windows-x64)	7m 1s
License Check and Audit Check (advisories)	50s
WASM integration smoke test	5m 40s
Rust build (all-features)	2m 22s
Rust build (with tokio dispatcher)	35s
SQL logic tests	1m 36s
C/C++ (lint)	8s
C++ build	1m 12s
Rust build (wasm32 with default features)	46s
License Check and Audit Check (bans licenses sources)	1m 11s
Rust (lint, no default)	2m 17s
Rust tests (linux-arm64)	4m 28s
	43m 14s

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