Don't import `vcpkg` on Windows by default (#124) #354

Job	Run time
build_dynamic_and_test_macos	2m 0s
build_dynamic_and_test_ubuntu	1m 33s
build_dynamic_and_test_windows_pre	2m 24s
build_static_and_test_ubuntu	5m 43s
build_static_and_test_ubuntu_with_system_ffmpeg	1m 15s
build_with_vcpkg_ffmpeg_windows (x86_64-pc-windows-msvc, x64-windows-static, -Ctarget-feature=+cr...	1m 42s
docs_rs_check	1m 11s
build_with_vcpkg_ffmpeg_windows (x86_64-pc-windows-msvc, x64-windows-static-md)	1m 48s
rust_clippy_check_ubuntu	5m 22s
build_with_vcpkg_ffmpeg_windows (x86_64-pc-windows-msvc, x64-windows, true)	1m 48s
rust_clippy_check_windows	1m 33s
build_with_vcpkg_ffmpeg_windows (i686-pc-windows-msvc, x86-windows-static, -Ctarget-feature=+crt-...	1m 59s
rustfmt_check (macos-latest)	7s
build_with_vcpkg_ffmpeg_windows (i686-pc-windows-msvc, x86-windows-static-md)	1m 38s
rustfmt_check (windows-latest)	16s
build_with_vcpkg_ffmpeg_windows (i686-pc-windows-msvc, x86-windows, true)	1m 41s
rustfmt_check (ubuntu-latest)	4s
build_dynamic_and_test_windows	1m 37s
	33m 41s

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