Use sourceparams as it is when it is there (#1148)

**Related Ticket:** _{link related ticket here}_

### Description of Changes
While working on render extension talk, I realized that the authors
don't necessarily use array format for rescale value (ex. rescale value
for hls-ndvi layer in this file:
https://raw.githubusercontent.com/NASA-IMPACT/veda-config/develop/datasets/hls-ndvi-ian.data.mdx
is string `-1,1`) To support what we have now, I think we should return
the source parameter as it is.

### Notes & Questions About Changes
I also simplified the logic a little bit, please check if I am missing
anything!

app/scripts/components/exploration/data-utils-no-faux-module.ts

@@ -174,35 +174,27 @@ export function resolveRenderParams(
   datasetSourceParams: Record<string, any> | undefined,
   queryDataRenders: Record<string, any> | undefined
 ): Record<string, any> | undefined {
-  let renderParams: Record<string, any> | undefined;
   // Start with sourceParams from the dataset.
+  // Return the source param as it is if exists
   if (hasValidSourceParams(datasetSourceParams)) {
-    renderParams = datasetSourceParams;
+    return datasetSourceParams;
   }
 
-  // Check for the dashboard render configuration in queryData if not defined.
-  if (!renderParams && queryDataRenders?.dashboard) {
-    renderParams = queryDataRenders.dashboard;
+  // Check for the dashboard render configuration in queryData
+  if (!queryDataRenders) throw new Error ('No render parameter exists from stac endpoint.');
 
-    if (renderParams?.rescale) {
-      renderParams.rescale = flattenAndCalculateMinMax([renderParams.rescale]);
-    }
-  }
-
-  // Check for asset-specific renders using the sourceParams' assets property.
-  if (!renderParams && queryDataRenders?.[datasetSourceParams?.assets]) {
-    renderParams = queryDataRenders[datasetSourceParams?.assets];
+  // Check the namespace from render extension
+  const renderKey = queryDataRenders.dashboard? 'dashboard' : datasetSourceParams?.assets;
+  if (!queryDataRenders[renderKey]) throw new Error ('No proper render parameter for dashboard namespace exists.');
 
-    if (renderParams?.rescale) {
-      renderParams.rescale = flattenAndCalculateMinMax(renderParams.rescale);
-    }
-  }
-
-  if (renderParams?.rescale) {
-    renderParams.rescale = flattenAndCalculateMinMax(renderParams.rescale);
+  // Return the render extension parameter
+  if (queryDataRenders[renderKey] && hasValidSourceParams(queryDataRenders[renderKey])) {
+    const renderParams = queryDataRenders[renderKey];
+    return {
+      ...renderParams,
+      rescale: flattenAndCalculateMinMax([renderParams.rescale])
+    };
   }
-
-  return renderParams;
 }
 
 export function getTimeDensityStartDate(date: Date, timeDensity: TimeDensity) {