feat: SDK improvements

Add a way to pull stateless contracts code from node, add more settings to test_assets.yaml, add logic to allow dynamic stateless contract by calling another contract

substreams/ethereum-template/test_assets.yaml

@@ -8,6 +8,8 @@ tests:
   - name: test_pool_creation
     start_block: 123
     stop_block: 456
+    initialized_accounts:
+      - "0x0c0e5f2fF0ff18a3be9b835635039256dC4B4963" # Needed for ....
     expected_state:
       protocol_components:
         - id: "0xbebc44782c7db0a1a60cb6fe97d0b483032ff1c7"
@@ -17,6 +19,7 @@ tests:
             - "0x6b175474e89094c44da98b954eedeac495271d0f"
           static_attributes:
           creation_tx: "0x20793bbf260912aae189d5d261ff003c9b9166da8191d8f9d63ff1c7722f3ac6"
+          skip_simulation: false
   - name: test_something_else
     start_block: 123
     stop_block: 456
@@ -28,3 +31,4 @@ tests:
             - "0xae7ab96520DE3A18E5e111B5EaAb095312D7fE84"
           static_attributes:
           creation_tx: "0xfac67ecbd423a5b915deff06045ec9343568edaec34ae95c43d35f2c018afdaa"
+          skip_simulation: true # If true, always add a reason