As an API user I want to be able to edit statements on Sensess through wbeditentity in order to quickly add/modify/remove data.
**Problem:**
Currently editing of statements on Senses is not supported via wbeditentity.
**Example:**
!!TBA!!
**BDD**
```
GIVEN I make a wbeditentity API request with the "claims" key set within a sense's JSON
WHEN I submit the request
THEN the sense's statements are modified accordingly
```
**Acceptance criteria:**
* statements are saved persistently
* edit summary shows up in recent changes/Lexeme history/watchlist
* statements contain a GUID that is correctly prefixed with the sense id they describe ([[ https://github.com/wikimedia/mediawiki-extensions-WikibaseLexeme/blob/master/src/DataAccess/ChangeOp/ChangeOpFormAdd.php#L59 | see ]])
**Notes:**
* This was done for Forms in T194732