Allow passing extra duckdb_tag and extension_tag internal options #80

Job	Run time
Extension template / Generate matrix	22s
Rust builds (using Delta extension) / Generate matrix	24s
Extension template / MacOS (osx_amd64, x86_64, x64-osx)	4m 6s
Extension template / Windows (windows_amd64, x64-windows-static-md)	20m 59s
Extension template / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	1m 54s
Extension template / MacOS (osx_arm64, arm64, arm64-osx)	1m 47s
Extension template / Windows (windows_amd64_rtools, x64-mingw-static)	47m 5s
Extension template / Linux (linux_amd64, ubuntu:18.04, x64-linux)	8m 33s
Extension template / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	1m 54s
Extension template / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	7m 14s
Extension template / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	2m 7s
Extension template / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	8m 40s
Rust builds (using Delta extension) / Linux (linux_amd64, ubuntu:18.04, x64-linux)	19m 26s
Rust builds (using Delta extension) / MacOS (osx_amd64, x86_64, x64-osx)	8m 16s
Rust builds (using Delta extension) / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	19m 24s
Rust builds (using Delta extension) / Windows	0s
Rust builds (using Delta extension) / MacOS (osx_arm64, arm64, arm64-osx)	7m 3s
Rust builds (using Delta extension) / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	21m 11s
Rust builds (using Delta extension) / DuckDB-Wasm	0s
	3h 0m 25s

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