[Security Solution] Prevents the Status badge from stretching in th…

…e Alert Details flyout (#116237)

## [Security Solution] Prevents the `Status` badge from stretching in the Alert Details flyout

This PR fixes <#115709> to prevent the `Status` badge from stretching in the Alert Details flyout.

### Screenshots

**Before:**

![before](https://user-images.githubusercontent.com/4459398/138806049-895317b6-2990-43f6-b978-dab1711494a5.png)

After Chrome `95.0.4638.54`:

![after-chrome](https://user-images.githubusercontent.com/4459398/138806164-ce802982-5c5a-4a30-a906-1583e2ba9939.png)

After Firefox `93.0`:

![after-firefox](https://user-images.githubusercontent.com/4459398/138806249-152a6b33-f1b9-4a5b-8607-8da29689d599.png)

After Safari `15.0`:

![after-safari](https://user-images.githubusercontent.com/4459398/138806320-45202b3a-1f84-4a4f-8fd0-107523597a22.png)

### Details

The fix overrides the default value of `EuiFlexGroup`'s `alignItems` prop, which has a default value of `stretch`, per the image below:

![EuiFlexGroup_alignItems](https://user-images.githubusercontent.com/4459398/138805941-96e06533-8df7-447c-bb74-9278a06d39db.png)

x-pack/plugins/security_solution/public/common/components/event_details/table/field_value_cell.test.tsx

@@ -180,6 +180,12 @@ describe('FieldValueCell', () => {
       );
     });
 
+    test('it aligns items at the start of the group to prevent content from stretching (by default)', () => {
+      expect(screen.getByTestId(`event-field-${hostIpData.field}`)).toHaveClass(
+        'euiFlexGroup--alignItemsFlexStart'
+      );
+    });
+
     test('it renders link buttons for each of the host ip addresses', () => {
       expect(screen.getAllByRole('button').length).toBe(hostIpValues.length);
     });

x-pack/plugins/security_solution/public/common/components/event_details/table/field_value_cell.tsx

@@ -37,6 +37,7 @@ export const FieldValueCell = React.memo(
   }: FieldValueCellProps) => {
     return (
       <EuiFlexGroup
+        alignItems="flexStart"
         data-test-subj={`event-field-${data.field}`}
         direction="column"
         gutterSize="none"