Update release with 1.31.1 (to enable a release build for compliance checks)#14252

sean-mcmanus wants to merge 32 commits intoreleasemicrosoft/vscode-cpptools:releasefrom

seanmcm/updateRelease_1_31_1microsoft/vscode-cpptools:seanmcm/updateRelease_1_31_1Copy head branch name to clipboard