Leaderboard page should display Top 10 Accounts by balance for each coin

[gthoma17]

Business/User Value: As an Explorer of Diem I want to who owns the most coins so that I don't have to use a CLI to get this info

Acceptance Criteria

GIVEN I am on the Leaderboard page
THEN I see a table with the Top 10 accounts ordered by balance for each coin

DESIGN NOTES
The tables should display:

• Rank
• Address (as a link)
• Amount

DEV NOTES

• Just do XUS for now
• The query to get this data currently takes way too long.
  • Consider creating a view to simplify the query
  • Also consider adding an index on balance to improve query performance
  • Here's the queries we tried:

accounts_balances(limit: 10, order_by: {balance: desc}, where: {currency: {_eq: "XUS"}}) {
    address
    balance
    currency
    timestamp
    version
  }
realtime_account_balances(limit: 10, order_by: {balance: desc}, where: {currency: {_eq: "XUS"}}) {
    account
    balance
    blockchain_timestamp
    currency
    indexer_timestamp
    version
  }

[gthoma17]

Opened a PR for indexer https://github.com/diem/operations/pull/2633

[gthoma17]

topAccounts.mov