[Phase 1] Default-on auto-upgrade with SHOPIFY_CLI_NO_AUTO_UPGRADE escape hatch#7000

alfonso-noriega wants to merge 5 commits into03-12-port_auto_upgrade_poc_to_mainShopify/cli:03-12-port_auto_upgrade_poc_to_mainfrom

03-12-no-auto-upgrade-escape-hatchShopify/cli:03-12-no-auto-upgrade-escape-hatchCopy head branch name to clipboard