fix(functions): Handle cross projects global suspect functions (#50489)

When the global-views feature is off, we need to correctly handle the
totals query in the global suspect functions and make sure we don't
query for my projects when the first slowest functions queries returns
no results.

static/app/views/profiling/landing/slowestFunctionsWidget.spec.tsx

@@ -33,6 +33,31 @@ describe('SlowestFunctionsWidget', function () {
     expect(await screen.findByTestId('error-indicator')).toBeInTheDocument();
   });
 
+  it('renders no functions', async function () {
+    // for the slowest functions query
+    MockApiClient.addMockResponse({
+      url: '/organizations/org-slug/events/',
+      body: {
+        data: [],
+      },
+      match: [
+        MockApiClient.matchQuery({
+          dataset: 'profileFunctions',
+          query: 'is_application:1',
+          field: ['project.id', 'package', 'function', 'count()', 'sum()'],
+        }),
+      ],
+    });
+
+    render(<SlowestFunctionsWidget />);
+
+    // starts by rendering loading
+    expect(screen.getByTestId('loading-indicator')).toBeInTheDocument();
+
+    // switches to the no functions view
+    expect(await screen.findByText('No functions found')).toBeInTheDocument();
+  });
+
   it('renders example transactions', async function () {
     // for the slowest functions query
     MockApiClient.addMockResponse({

static/app/views/profiling/landing/slowestFunctionsWidget.tsx

@@ -4,6 +4,7 @@ import styled from '@emotion/styled';
 import {Button} from 'sentry/components/button';
 import {HeaderTitleLegend} from 'sentry/components/charts/styles';
 import Count from 'sentry/components/count';
+import EmptyStateWarning from 'sentry/components/emptyStateWarning';
 import IdBadge from 'sentry/components/idBadge';
 import Link from 'sentry/components/links/link';
 import LoadingIndicator from 'sentry/components/loadingIndicator';
@@ -16,7 +17,6 @@ import {CHART_PALETTE} from 'sentry/constants/chartPalette';
 import {IconChevron, IconWarning} from 'sentry/icons';
 import {t, tct} from 'sentry/locale';
 import {space} from 'sentry/styles/space';
-import {defined} from 'sentry/utils';
 import {EventsResultsDataRow} from 'sentry/utils/profiling/hooks/types';
 import {useProfileFunctions} from 'sentry/utils/profiling/hooks/useProfileFunctions';
 import {generateProfileFlamechartRouteWithQuery} from 'sentry/utils/profiling/routes';
@@ -46,6 +46,10 @@ export function SlowestFunctionsWidget() {
     limit: MAX_FUNCTIONS,
   });
 
+  const hasFunctions = useMemo(() => {
+    return (functionsQuery.data?.data?.length || 0) > 0;
+  }, [functionsQuery.data]);
+
   const totalsQuery = useProfileFunctions<TotalsField>({
     fields: totalsFields,
     referrer: 'api.profiling.suspect-functions.totals',
@@ -63,7 +67,7 @@ export function SlowestFunctionsWidget() {
           ),
         ]
       : [],
-    enabled: functionsQuery.isFetched && defined(functionsQuery.data?.data),
+    enabled: functionsQuery.isFetched && hasFunctions,
   });
 
   return (
@@ -73,16 +77,21 @@ export function SlowestFunctionsWidget() {
         <Subtitle>{t('Slowest functions by total time spent.')}</Subtitle>
       </HeaderContainer>
       <ContentContainer>
-        {(functionsQuery.isError || totalsQuery.isError) && (
+        {(functionsQuery.isLoading || (hasFunctions && totalsQuery.isLoading)) && (
           <StatusContainer height="100%">
-            <IconWarning data-test-id="error-indicator" color="gray300" size="lg" />
+            <LoadingIndicator />
           </StatusContainer>
         )}
-        {(functionsQuery.isLoading || totalsQuery.isLoading) && (
+        {(functionsQuery.isError || totalsQuery.isError) && (
           <StatusContainer height="100%">
-            <LoadingIndicator />
+            <IconWarning data-test-id="error-indicator" color="gray300" size="lg" />
           </StatusContainer>
         )}
+        {functionsQuery.isFetched && !hasFunctions && (
+          <EmptyStateWarning>
+            <p>{t('No functions found')}</p>
+          </EmptyStateWarning>
+        )}
         {functionsQuery.isFetched && totalsQuery.isFetched && (
           <Accordion>
             {(functionsQuery.data?.data ?? []).map((f, i) => {
@@ -292,6 +301,10 @@ const Subtitle = styled('div')`
 
 const ContentContainer = styled('div')`
   flex: 1 1 auto;
+
+  display: flex;
+  flex-direction: column;
+  justify-content: center;
 `;
 
 const Accordion = styled('ul')`