test(dataset configs): use accumulate source (#94)

Updates the datasets configs in the system-level tests to be compatible with the recently merged PR 326 in anemoi-datasets.

Author: aaron-hopkinson

tests/system-level/anemoi_test/configs/datasets/aifs-ea-an-oper-0001-mars-o96-2017-2017-6h-v8-testing/dataset_config.yaml

@@ -38,13 +38,17 @@ input:
       param:
       - q
       - t
-  - accumulations:
-      class: ea
-      expver: '0001'
-      grid: o96
-      param:
-      - cp
-      - tp
+  - accumulate:
+      period: 6h
+      availability: auto
+      source:
+        mars:
+          class: ea
+          expver: '0001'
+          grid: o96
+          param:
+          - cp
+          - tp
   - constants:
       param:
       - cos_latitude

tests/system-level/anemoi_test/configs/datasets/cerra-rr-an-oper-0001-mars-5p5km-2017-2017-6h-v3-testing/dataset_config.yaml

@@ -45,14 +45,18 @@ input:
       - msl
       stream: oper
       type: an
-  - accumulations:
-      class: rr
-      levtype: sfc
-      origin: se-al-ec
-      param:
-      - tp
-      - sf
-      stream: oper
+  - accumulate:
+      period: 6h
+      availability: auto
+      source:
+        mars:
+          class: rr
+          levtype: sfc
+          origin: se-al-ec
+          param:
+          - tp
+          - sf
+          stream: oper
   - constants:
       param:
       - cos_latitude