[Due for payment 2026-04-23] Add selector to AccountManagerBanner for PERSONAL_DETAILS_LIST

[JS00001]

AccountManagerBanner was subscribing to the entire PERSONAL_DETAILS_LIST Onyx key and then extracting a single account manager's personal details using getPersonalDetailsForAccountIDs. This caused the component to re-render whenever any user's personal details changed, even though it only needs the account manager's data.

This change replaces that full subscription with a targeted useOnyx selector that extracts only the account manager's personal details by account ID. The getPersonalDetailsForAccountIDs helper and its import are no longer needed and have been removed.

PR: #87558

Issue Owner

Current Issue Owner: @mallenexpensify

[ZhenjaHorbach]

@JS00001
Can you assign me here, please?
Since I was a reviewer?