chore: reorganise GA to check and build once and run tests with matrix strategy VSCODE-703#1133

himanshusinghs wants to merge 14 commits intomainmongodb-js/vscode:mainfrom

chore/gh-actions-reorg-for-install-testsmongodb-js/vscode:chore/gh-actions-reorg-for-install-testsCopy head branch name to clipboard