fix(cpp): escape cpp keywords #3338

Job	Run time
Test Async (allowed to fail)	1m 28s
Build wit-bindgen (x86_64-macos, macos-latest, x86_64-apple-darwin)	3m 28s
Build wit-bindgen (x86_64-windows, windows-latest)	8m 1s
Build wit-bindgen (x86_64-linux, ubuntu-latest)	2m 40s
Crate Unit Tests	2m 51s
Build wit-bindgen (aarch64-linux, ubuntu-latest, aarch64-unknown-linux-gnu)	2m 39s
Rustfmt	10s
Check	2m 25s
Test (ubuntu-latest, csharp)	10m 58s
Build wit-bindgen (aarch64-macos, macos-latest, aarch64-apple-darwin)	3m 20s
Test (macos-latest, c)	4m 24s
Test (ubuntu-latest, c)	2m 0s
Test (ubuntu-latest, cpp)	1m 57s
Test (macos-latest, cpp)	3m 5s
Test (macos-latest, rust)	2m 35s
verify-publish	2m 20s
Test (windows-latest, csharp)	15m 27s
Test (ubuntu-latest, rust)	2m 53s
Test (windows-latest, rust)	5m 29s
Test (windows-latest, c)	6m 29s
Test (windows-latest, cpp)	5m 30s
Record the result of testing and building steps	2s
	1h 30m 11s

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