Update reject_duplicated_checksums to only apply to asset files

[lucyxiang]

WHY are these changes introduced?

Fixes #3138

WHAT is this pull request doing?

We only want to reject duplicate *.json and *.json.liquid for files under assets/* and not files under other directories.

How to test your changes?

1. Add product.json and product.json.liquid to your theme
2. shopify theme pull
3. See that both files are pulled locally

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/advanced-edits
• 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	73.11% (-0.01% 🔻)	6256/8557
🟡	Branches	70.71% (-0.02% 🔻)	3044/4305
🟡	Functions	71.82%	1585/2207
🟡	Lines	74.25% (-0.01% 🔻)	5941/8001

Show files with reduced coverage 🔻

St.❔	File	Statements	Branches	Functions	Lines
🟢	... / ConcurrentOutput.tsx	97.62% (-2.38% 🔻)	75% (-8.33% 🔻)	100%	97.44% (-2.56% 🔻)

Test suite run success

1495 tests passing in 670 suites.

Report generated by 🧪jest coverage report action from 2e1d555

[karreiro]

Thank you, @lucyxiang!