Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Unit tests (npm test) were run locally and passed
• E2E Tests (npm run test.karma.prod) were run locally and passed
• Prettier (npm run prettier) was run locally and passed

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

While going through the #3005, I realized that we use the source map linking string in multiple places. This isn't ideal, because I think at some point we're going to need to specially encode the URL, and I'd prefer not to update it in several locations

GitHub Issue Number: N/A

What is the new behavior?

• Extracts the generation of the URL linker into two helper methods

Does this introduce a breaking change?

• Yes
• No

Testing

• Added unit tests
• Smoke tested with a sample Stencil app, with a global script defined/created

Other information