fix(modern): wrong assets mapping in ssr client modern mode

[clarkdo]

Types of changes

• Bug fix (a non-breaking change which fixes an issue)
• New feature (a non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Description

Fix #7311

When there're multiple async chunks in a component, the client modern mode is wrongly mapping, this pr is fixing this issue by using array to map between legacy and modern files.

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly. (PR: #)
• I have added tests to cover my changes (if not applicable, please state why)
• All new and existing tests are passing.