45762 style(workflows): Update tooltip positioning and z-index for improved visibility

- Added `appendTo` and `zIndex` properties to tooltips in `WorkflowsTableActions` for better rendering.
- Adjusted z-index of the `.container__actions--wide-table` class to ensure proper stacking context.

Author: pneumatic-ilyacedrik

frontend/src/public/components/Workflows/WorkflowsTablePage/WorkflowsTable/WorkflowsTable.css

@@ -219,6 +219,7 @@
 
 .container__actions--wide-table {
   position: sticky;
+  z-index: 5;
   left: 0;
   margin-bottom: 1.6rem;
   padding: 0 2.4rem 0 3.2rem;

frontend/src/public/components/Workflows/WorkflowsTablePage/WorkflowsTable/WorkflowsTableActions.tsx

@@ -124,13 +124,17 @@ export function WorkflowsTableActions({
         {isExportDisabled ? (
           <Tooltip
             content={formatMessage({ id: exportTooltipContentId })}
+            appendTo={() => document.body}
+            zIndex={1040}
             contentClassName={styles['workflow-tune-view-tooltip']}
           >
             <div>{exportControl}</div>
           </Tooltip>
         ) : (
           <Tooltip
             content={formatMessage({ id: 'workflows.export-excel-tooltip-all' })}
+            appendTo={() => document.body}
+            zIndex={1040}
             contentClassName={styles['workflow-tune-view-tooltip']}
           >
             <div>{exportControl}</div>