Support user provided manifest in NextFederationPLugin

[karanpvyas]

Clear and concise description of the problem

I need to pass in custom manifest in my enterprise work, currently the existing implementation doesn't pass on the user provided manifest in federation options.

Suggested solution

Simple pass it on from the options provided by the user.

Alternative

No response

Additional context

No response

Validations

• Read the Contributing Guidelines.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.