Move `trait SizeBytes` to new crate `re_byte_size` #15676

Job	Run time
paths-filter	6s
Checks / Check if running codegen would produce any changes	1m 14s
Checks / Lint markdown	17s
Checks / Rerun lints	35s
Checks / Misc formatting	17s
Checks / Spell Check	9s
Checks / markdown-paths-filter	4s
Checks / Check links	33s
C++ tests	0s
Python Checks	0s
Deploy Landing Preview	0s
Minimum CLI Build / Set Config (linux-x64)	2s
Rust Checks / Rust lints (fmt, check, clippy, tests, doc)	8m 58s
Rust Checks / Test on ${{ matrix.name }}	0s
Build rerun_js / Build rerun_js	3m 16s
Build web viewer / Build web viewer	3m 12s
Minimum CLI Build / Build rerun-cli (ubuntu-latest-16-cores)	5m 20s
Upload Web / Upload web build to google cloud (wasm32 + wasm-bindgen)	10s
Minimum Wheel Build / Set Config (linux-x64)	1s
Minimum Wheel Build / Build Wheels (ubuntu-latest-16-cores)	58s
Minimum Wheel Test	0s
	25m 12s

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