Reuse external workflows in Fuzzer CI #105

Job	Run time
Build extension binaries / Generate matrix	23s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	2m 20s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	4m 33s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	2m 9s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	1m 56s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	4m 36s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	22m 50s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	2m 30s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	1m 45s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	4m 42s
Build extension binaries / Windows (windows_amd64_rtools, x64-mingw-static)	43m 11s
Deploy extension binaries / Generate matrix	27s
Deploy extension binaries / Deploy (linux_amd64)	31s
Deploy extension binaries / Deploy (linux_amd64_gcc4)	35s
Deploy extension binaries / Deploy (linux_arm64)	33s
Deploy extension binaries / Deploy (osx_amd64)	52s
Deploy extension binaries / Deploy (osx_arm64)	51s
Deploy extension binaries / Deploy (windows_amd64)	31s
Deploy extension binaries / Deploy (windows_amd64_rtools)	34s
Deploy extension binaries / Deploy (wasm_mvp)	29s
Deploy extension binaries / Deploy (wasm_eh)	32s
Deploy extension binaries / Deploy (wasm_threads)	31s
	1h 37m 21s

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