Wdfn 768 - Convert the legend component to vue

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• Put the appropriate EXEMPT flag if needed in the MR title (see https://practices.wma.chs.usgs.gov/practice/peer_code_review/)
• Run all linters (make lint)
• Run all tests (make test)
• Update the changelog appropriately
• If making a release, update code.json metadataLastUpdated and bump CHANGELOG.md to next version.

Description

Added a vue component for the hydrograph legend. Added the graph controls component to the hydrograph app.

After making a pull request

• If appropriate, put the link to the PR in the JIRA ticket
• Assign someone to review unless the change is trivial

assets/src/scripts/monitoring-location/components/hydrograph/index.js

@@ -159,16 +159,6 @@ export const attachToNode = function(store,
         hydrographApp.mount('#hydrograph-brush-container');
     }
     if (!showOnlyGraph) {
-        // const graphControlsApp = createApp(GraphControlsApp, {});
-        // graphControlsApp.use(ReduxConnectVue, {
-        //     store,
-        //     mapDispatchToPropsFactory: (actionCreators) => (dispatch) => bindActionCreators(actionCreators, dispatch),
-        //     mapStateToPropsFactory: createStructuredSelector
-        // });
-        // graphControlsApp.provide('store', store);
-        // graphControlsApp.provide('siteno', siteno);
-        // graphControlsApp.mount('.ts-legend-controls-container');
-
         const parameterSelectionApp = createApp(ParameterSelectionApp, {});
         parameterSelectionApp.use(ReduxConnectVue, {
             store,