Replace hardcoded percentages with values from a file #144

Job	Run time
Build extension binaries / Generate matrix	28s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	3s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	3s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	4s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	5s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	2s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	7s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	2s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	2s
Build extension binaries / Windows (windows_amd64_rtools, x64-mingw-static)	1s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	7s
Deploy extension binaries	1s
	1m 5s

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