Revert update checkout UI template

[vividviolet]

Revert the update to checkout ui extension template (#1275)

Post-release steps

Measuring impact

How do we know this change was effective? Please choose one:

• n/a - this doesn't need measurement, e.g. a linting rule or a bug-fix
• Existing analytics will cater for this addition
• PR includes analytics changes to measure impact

Checklist

• I've considered possible cross-platform impacts (Mac, Linux, Windows)
• I've considered possible documentation changes
• I've made sure that any changes to dev or deploy have been reflected in the internal flowchart.

[github-actions]

Thanks for your contribution!

Depending on what you are working on, you may want to request a review from a Shopify team:

• Themes: @shopify/theme-developer-tools
• UI extensions: @shopify/ui-extensions-cli
  • Checkout UI extensions: @shopify/checkout-ui-extensions-api-stewardship
• Hydrogen: @shopify/hydrogen
• Other: @shopify/cli-foundations

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	71.78% (-0.03% 🔻)	3940/5489
🟡	Branches	69.19% (-0.04% 🔻)	1781/2574
🟡	Functions	70.18% (-0.04% 🔻)	1033/1472
🟡	Lines	73.01% (-0.04% 🔻)	3758/5147

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / extension.ts	96.43% (-3.57% 🔻)	91.67% (-8.33% 🔻)	100%	96% (-4% 🔻)
🟢	... / generate.ts	95.35% (-0.11% 🔻)	89.29%	88.89% (-1.11% 🔻)	97.3% (-0.14% 🔻)

Test suite run success

1010 tests passing in 518 suites.

Report generated by 🧪jest coverage report action from 64b107c

[github-actions]

Benchmark report

The following table contains a summary of the startup time for all commands.

Status	Command	Baseline (avg)	Current (avg)	Diff
🟢	app build	1363 ms	1405 ms	3.08 %
🟢	app deploy	1644 ms	1699.33 ms	3.37 %
🟢	app dev	1679 ms	1688.33 ms	0.56 %
🟢	app env pull	1531 ms	1561 ms	1.96 %
🟢	app env show	1563.33 ms	1540.67 ms	-1.45 %
🟢	app generate extension	1559 ms	1623.67 ms	4.15 %
🟢	app generate schema	1544.67 ms	1564.33 ms	1.27 %
🟢	app info	1507.33 ms	1544 ms	2.43 %
🟢	app scaffold extension	1570 ms	1614.67 ms	2.85 %
🟢	app update-url	1451.33 ms	1481 ms	2.04 %
🟢	theme check	1258.33 ms	1275.33 ms	1.35 %
🟢	theme delete	1419.67 ms	1449.33 ms	2.09 %
🟢	theme dev	1443 ms	1476 ms	2.29 %
🟢	theme help-old	1250.67 ms	1237.33 ms	-1.07 %
🟢	theme info	1313.33 ms	1350 ms	2.79 %
🟢	theme init	1336.67 ms	1315.67 ms	-1.57 %
🟢	theme language-server	1248.33 ms	1274.33 ms	2.08 %
🟢	theme list	1456.67 ms	1479 ms	1.53 %
🟢	theme open	1476 ms	1427 ms	-3.32 %
🟢	theme package	1330 ms	1364 ms	2.56 %
🟢	theme publish	1443.33 ms	1450.33 ms	0.48 %
🟢	theme pull	1438.33 ms	1472.67 ms	2.39 %
🟢	theme push	1475.33 ms	1439.33 ms	-2.44 %
🟢	theme serve	1465.33 ms	1528.33 ms	4.3 %
🟢	theme share	1429 ms	1441 ms	0.84 %
🟢	webhook trigger	1477.67 ms	1483.33 ms	0.38 %