Fixed double boards list query on EE

What does this MR do and why?

Previously, when we were fetching deferred boardList query on EE, we had it duplicated: the first query was fetching a CE-version (issuesCount of issues only), the second one was EE-specific (fetching also totalWeight). This MR changes import of the query to ee_else_ce everywhere so we're fetching a correct one only for both EE and CE instances

Screenshots or screen recordings

Before	After

How to set up and validate locally

1. Open issue boards
2. Check the last GraphQL query
3. There should be only one boardList request for every single list ID.

MR acceptance checklist

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