Introduce eager serialization & update/clear APIs in the C++ SDK #16223

Job	Run time
paths-filter	5s
Checks / Check if running codegen would produce any changes	1m 22s
Checks / Rerun lints	37s
Checks / Lint markdown	15s
Checks / Misc formatting	18s
Checks / Spell Check	5s
Checks / markdown-paths-filter	5s
Python Checks	0s
Deploy Landing Preview	0s
Rust Checks / Test on ${{ matrix.name }}	0s
Rust Checks / Rust lints (fmt, check, clippy, tests, doc)	3m 10s
C++ tests / C++ formatting check	3m 6s
Build rerun_js / Build rerun_js	2m 10s
C++ tests / matrix_prep	5s
Minimum CLI Build / Set Config (linux-x64)	3s
Build web viewer / Build web viewer	2m 7s
Checks / Check links	0s
C++ tests / C++ build & test - Linux x64, C++17	2m 2s
C++ tests / C++ build & test - Linux x64, C++20	1m 52s
C++ tests / C++ build & test - Windows x64	2m 59s
C++ tests / C++ build & test - Mac aarch64	3m 5s
Minimum CLI Build / Build rerun-cli (ubuntu-latest-16-cores)	1m 37s
Minimum Wheel Build	0s
Minimum Wheel Test	0s
Upload Web	0s
	25m 3s

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