Suppress Circular Dependencies Warnings related to D3 (#1501)

# Pull Request

## 🤨 Rationale

The d3 library chooses to intentionally keep circular dependencies:
d3/d3-selection#168

Rollup reports circular dependencies as warnings but to limit verbosity
only show the first few so all we see are warnings related to d3.
Example:

```
> rollup --bundleConfigAsCjs --config


dist/esm/all-components.js → dist/all-components-bundle.js...
(!) Circular dependencies
../../node_modules/d3-selection/src/selection/index.js -> ../../node_modules/d3-selection/src/selection/select.js -> ../../node_modules/d3-selection/src/selection/index.js
../../node_modules/d3-selection/src/selection/index.js -> ../../node_modules/d3-selection/src/selection/selectAll.js -> ../../node_modules/d3-selection/src/selection/index.js
../../node_modules/d3-selection/src/selection/index.js -> ../../node_modules/d3-selection/src/selection/filter.js -> ../../node_modules/d3-selection/src/selection/index.js
...and 12 more
created dist/all-components-bundle.js in 12.3s
```

If we introduce circular dependencies or add a library that introduces
additional circular dpendencies they may be missed.

## 👩‍💻 Implementation

Implemented a rollup onwarn handler that can filter out the d3 libraries
circular dependency warnings.

## 🧪 Testing

Validated locally that choosing a more specific prefix like
`d3-selection` will filter only warnings for that subset and let others
through.

## ✅ Checklist

- [x] I have updated the project documentation to reflect my changes or
determined no changes are needed.

change/@ni-nimble-components-b4363203-ef9a-4f2f-a5b0-011890fe1997.json

@@ -0,0 +1,7 @@
+{
+  "type": "none",
+  "comment": "Filter rollup d3 related warning messages",
+  "packageName": "@ni/nimble-components",
+  "email": "rajsite@users.noreply.github.com",
+  "dependentChangeType": "none"
+}

packages/nimble-components/rollup.config.js

@@ -16,6 +16,29 @@ const umdProductionPlugin = () => replace({
     preventAssignment: true
 });
 
+// d3 has circular dependencies it won't remove:
+// https://github.com/d3/d3-selection/issues/168
+// So ignore just d3's circular dependencies following the pattern from:
+// https://github.com/rollup/rollup/issues/1089#issuecomment-635564942
+// Updated to use current onwarn api:
+// https://rollupjs.org/configuration-options/#onwarn
+const onwarn = (warning, defaultHandler) => {
+    const ignoredWarnings = [
+        {
+            code: 'CIRCULAR_DEPENDENCY',
+            file: 'node_modules/d3-'
+        }
+    ];
+
+    if (
+        !ignoredWarnings.some(
+            ({ code, file }) => warning.code === code && warning.message.includes(file)
+        )
+    ) {
+        defaultHandler(warning);
+    }
+};
+
 // eslint-disable-next-line import/no-default-export
 export default [
     {
@@ -32,7 +55,8 @@ export default [
             resolve(),
             commonJS(),
             json()
-        ]
+        ],
+        onwarn
     },
     {
         input: 'dist/esm/all-components.js',
@@ -55,6 +79,7 @@ export default [
             resolve(),
             commonJS(),
             json()
-        ]
+        ],
+        onwarn
     }
 ];