[js][bidi] fix addPreloadScript failing tests

[TamsilAmani]

Description

Fix failing tests for Script Module [bidi] addPreloadScript function. I have removed the assert for lineNumber as its value gets changed with every new release of Firefox.

Motivation and Context

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 change)

Checklist

• I have read the contributing document.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[diemol]

Thank you, @TamsilAmani!