Replace hardcoded percentages with values from a file #146

Job	Run time
Build extension binaries / Generate matrix	29s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	4m 4s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	10m 28s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	4m 1s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	1m 48s
Build extension binaries / Windows (windows_amd64_rtools, x64-mingw-static)	10m 30s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	2m 48s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	4m 21s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	2m 1s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	2m 17s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	2m 18s
Deploy extension binaries	1s
	45m 6s

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