fix: invalid HTML and react errors in insights pages (#6593)

This PR fixes these errors (that were showing up in the dev console) in
the insights pages:
- nesting a div within a p in the count header (flags, environments,
apps); instead flip the relationship and nest the p within the div
- missing keys in mapped components
- passing a boolean "scrolled" value to the underlying component (a div)
is invalid: instead, make it so that that prop is not passed

The only one of these that could have a visual impact is the first one
(p>div -> div>p), but it appears to be the same to me.

Here's before the change:

![image](https://github.com/Unleash/unleash/assets/17786332/ffffd3cc-1236-458f-8449-3310b0044f14)



And here's after:

![image](https://github.com/Unleash/unleash/assets/17786332/9ad2d8f7-9f9e-492f-932e-a194683b1d75)

frontend/src/component/executiveDashboard/ExecutiveDashboard.tsx

@@ -49,16 +49,16 @@ const ChartWidget = styled(Widget)(({ theme }) => ({
     },
 }));
 
-const StickyWrapper = styled(Box)<{ scrolled?: boolean }>(
+const StickyWrapper = styled(Box, {
-    ({ theme, scrolled }) => ({
+    shouldForwardProp: (prop) => prop !== 'scrolled',
+})<{ scrolled?: boolean }>(({ theme, scrolled }) => ({
     position: 'sticky',
     top: 0,
     zIndex: 1000,
     padding: scrolled ? theme.spacing(2, 0) : theme.spacing(0, 0, 2),
     background: theme.palette.background.application,
     transition: 'padding 0.3s ease',
-    }),
+}));
-);
 
 export const ExecutiveDashboard: VFC = () => {
     const [scrolled, setScrolled] = useState(false);

frontend/src/component/executiveDashboard/componentsChart/MetricsSummaryChart/MetricsChartTooltip/MetricsChartTooltip.tsx

@@ -36,10 +36,9 @@ const InfoLine = ({
 );
 
 const InfoSummary = ({ data }: { data: { key: string; value: number }[] }) => (
-    <Typography variant={'body1'} component={'p'}>
     <Box display={'flex'} flexDirection={'row'}>
         {data.map(({ key, value }) => (
-                <div style={{ flex: 1, flexDirection: 'column' }}>
+            <div style={{ flex: 1, flexDirection: 'column' }} key={key}>
                 <div
                     style={{
                         flex: 1,
@@ -47,13 +46,14 @@ const InfoSummary = ({ data }: { data: { key: string; value: number }[] }) => (
                         marginBottom: '4px',
                     }}
                 >
+                    <Typography variant={'body1'} component={'p'}>
                         {key}
+                    </Typography>
                 </div>
                 <div style={{ flex: 1, textAlign: 'center' }}>{value}</div>
             </div>
         ))}
     </Box>
-    </Typography>
 );
 
 export const MetricsSummaryTooltip: VFC<{ tooltip: TooltipState | null }> = ({

frontend/src/component/executiveDashboard/componentsChart/UpdatesPerEnvironmentTypeChart/UpdatesPerEnvironmentTypeChartTooltip/UpdatesPerEnvironmentTypeChartTooltip.tsx

@@ -39,7 +39,7 @@ const InfoSummary = ({ data }: { data: { key: string; value: number }[] }) => (
     <Typography variant={'body1'} component={'p'}>
         <Box display={'flex'} flexDirection={'row'}>
             {data.map(({ key, value }) => (
-                <div style={{ flex: 1, flexDirection: 'column' }}>
+                <div style={{ flex: 1, flexDirection: 'column' }} key={key}>
                     <div
                         style={{
                             flex: 1,