text: Title: Change `snapshot.assert_match(value)` to `assert snapshot == value`
  Body: ## Description
  With #7672 we changed which snapshot testing library we use which means we no longer have to serialize the data manually.
  
  We also changed to use a pure PyTest style for testing so we should do both for the last remaining tests, so we should change that.
  
  Turn all instances of this:
  ```python
      prices = fetch_price(target_datetime=historical_datetime, session=session)
  
      snapshot.assert_match(
          [
              {
                  "datetime": price["datetime"].isoformat(),
                  "zoneKey": price["zoneKey"],
                  "currency": price["currency"],
                  "price": price["price"],
                  "source": price["source"],
                  "sourceType": price["sourceType"].value,
              }
              for price in prices
          ]
      )
  ```
  
  Into this:
  ```python
      assert snapshot == fetch_price(target_datetime=historical_datetime, session=session)
  ```