[release/v7.4] Add rebuild branch support with conditional MSIX signing#26418

TravisEz13 merged 2 commits intoPowerShell:release/v7.4PowerShell/PowerShell:release/v7.4from

TravisEz13:backport/release/v7.4/26415-8b7e493ddTravisEz13/PowerShell:backport/release/v7.4/26415-8b7e493ddCopy head branch name to clipboard