fix: add LLVM 20.1.7 + mingw 15.1-r2 + gcovr via apt on Ubuntu by default #2117

Job	Run time
Build (ubuntu-22.04)	1m 16s
Test-ubuntu-22.04	5m 23s
Test-ubuntu-24.04-arm	5m 22s
Test-ubuntu-24.04	5m 23s
Test-macos-15	4m 25s
Test-windows-2022	5m 11s
Test-macos-14	4m 10s
Test-macos-13	5m 27s
Test-ubuntu-22.04-arm	5m 23s
Build-Executable-windows-2022	1m 0s
Build-Executable-ubuntu-22.04	35s
Build-Executable-ubuntu-22.04-arm	35s
Docker-setup-cpp-ubuntu-linux/amd64-24.04	5m 16s
Build-Executable-macos-13	1m 5s
Docker-setup-cpp-ubuntu-linux/amd64-22.04	5m 15s
Build-Executable-macos-14	37s
Docker-setup-cpp-alpine-linux/amd64-3.21	2m 34s
Docker-setup-cpp-ubuntu-linux/arm64-24.04	4m 30s
Docker-setup-cpp-ubuntu-linux/amd64-20.04	6m 9s
Docker-setup-cpp-ubuntu-linux/arm64-22.04	5m 15s
Docker-setup-cpp-arch-linux/amd64-base	2m 40s
Docker-setup-cpp-alpine-linux/arm64-3.21	5m 12s
Docker-setup-cpp-fedora-linux/amd64-40	5m 12s
Docker-setup-cpp-ubuntu-linux/arm64-20.04	4m 34s
Release	1s
Docker-Manifest	1s
	1h 32m 31s

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