fix: Stock Analytics Report must consider warehouse during calculation

[marination]

Consider the following:

• Here are SLEs for Item Bottle for the month of June.
• The total quantity in June should be (balance qty in Work In Progress - GP + balance qty in Stores - GP) = 11 + 6 = 17
  

Issue:

• 
• Stock Analytics Report haphazardly added actual_qty from SLEs irrespective of warehouse to generate the total qty in a month
• This gave out faulty values because while accounting for Stock Recos, considering warehouse is very important.
• It just added balance of SLEs in Work In Progress - GP to that of SLEs in Stores - GP, and so the balance shows as 11, which is just the balance of Stores - GP.
• Due to the stock reco on 15-06-2021, the first SLE in Work In Progress - GP is reset or ignored.

Fix:

• Maintain period and warehouse wise balances
• Add the all warehouse balances in a certain period, to get its actual total qty
• The total quantity in June is (balance qty in Work In Progress - GP + balance qty in Stores - GP) = 11 + 6 = 17
  
• Fixed brand filter which was not working

This can be tested using Quick Stock balance too. All the balances until the end of a month of each warehouse should add up to the value in the report

To test:

• create an item and create stock transactions in different warehouses
• in one warehouse's transactions, add a stock reco
• check values in stock analytics, month/week/quarter wise

[frappe-pr-bot]

The backport to version-13-hotfix failed.
Please backport the PR manually. 🤖

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