fix(runTime): use relative urls for defaulted report variables

[smackfu]

Description

Changes the default development ONE_CLIENT_REPORTING_URL and ONE_CLIENT_CSP_REPORTING_URL to use relative URLs instead of URLs with a hostname.

Motivation and Context

Fixes #1193 by not using the internal docker IP address.

How Has This Been Tested?

Ran locally with one-app-runner using these updated variables and verified that report endpoints responded with 204 and printed reports to console.

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (adding or updating documentation)
• Dependency update
• Security update

Checklist:

• My change requires a change to the documentation and I have updated the documentation accordingly.
• These changes should be applied to a maintenance branch.
• This change requires cross browser checks.
• Performance tests should be ran against the server prior to merging.
• This change impacts caching for client browsers.
• This change impacts HTTP headers.
• This change adds additional environment variable requirements for One App users.
• I have added the Apache 2.0 license header to any new files created.

What is the Impact to Developers Using One App?

When running in Docker, Javascript errors should be printed to the console rather than not being reported.

[smackfu]

Interestingly the documentation already says this is what is being used for the values:
https://github.com/americanexpress/one-app/blob/main/docs/api/server/Environment-Variables.md