test(labs): give the biomarker fixtures the new analyteKey field

BiomarkerDto gained analyteKey, and two component test fixtures typed as it
were missing the field, which the typecheck job rejects.

src/components/labs/__tests__/biomarker-form.test.tsx

@@ -28,6 +28,7 @@ const MARKER: BiomarkerDto = {
   lowerBound: 70,
   upperBound: 99,
   panel: null,
+  analyteKey: null,
   hasContext: false,
   context: null,
   hidden: false,

src/components/labs/__tests__/lab-biomarker-detail.test.tsx

@@ -51,6 +51,7 @@ const MARKER: BiomarkerDto = {
   lowerBound: 0,
   upperBound: 100,
   panel: null,
+  analyteKey: null,
   hasContext: false,
   context: null,
   hidden: false,