feat(replay): Fix resize split pane breaks network tabs (#102915)

This fixes a bug with the details split pane where the resize cursor
gets stuck as enabled and you cant click the network detail tabs. I've
removed the padding which seems to be the main cause.

Before
<img width="759" height="69" alt="image"
src="https://github.com/user-attachments/assets/e6fed3c3-0d75-4a55-89bc-66a4779c3109"
/>


After
<img width="683" height="53" alt="image"
src="https://github.com/user-attachments/assets/26c00b6c-ce04-4a7c-afc6-4d79b6ce0e2e"
/>

Author: billyvg

static/app/components/replays/virtualizedGrid/detailsSplitDivider.tsx

@@ -63,8 +63,6 @@ const CloseButtonWrapper = styled('div')`
 `;
 
 const StyledSplitDivider = styled(SplitDivider)`
-  padding: ${space(0.75)};
-
   :hover,
   &[data-is-held='true'] {
     z-index: ${p => p.theme.zIndex.initial};

static/app/views/replays/detail/network/details/tabs.tsx

@@ -36,8 +36,6 @@ function NetworkDetailsTabs() {
 }
 
 const TabsContainer = styled('div')`
-  padding-top: ${space(0.5)};
-  padding-inline: ${space(1.5)};
   border-bottom: 1px solid ${p => p.theme.border};
 `;