[PLAY-1700] Bug - Remove Default Padding in Section Separator When Ch…

…ildren are Passed (#4029)

**What does this PR do?** 
Removes the default padding for all children in the section separator,
except for the caption kit.


**Screenshots:**

Before Change:
![Screenshot 2024-12-18 at 3 33
41 PM](https://github.com/user-attachments/assets/90328cf9-9cae-4766-9791-e13c2e792814)

After Change:
![Screenshot 2024-12-18 at 3 34
27 PM](https://github.com/user-attachments/assets/87558032-44c0-4374-b70a-43eb7a4386ef)


#### Checklist:
- [x] **LABELS** Add a label: `enhancement`, `bug`, `improvement`, `new
kit`, `deprecated`, or `breaking`. See [Changelog &
Labels](https://github.com/powerhome/playbook/wiki/Changelog-&-Labels)
for details.
- [x] **DEPLOY** I have added the `milano` label to show I'm ready for a
review.

playbook/app/pb_kits/playbook/pb_section_separator/_section_separator.scss

@@ -19,8 +19,11 @@ $section_colors_dark: (
   align-items: center;
   position: relative;
   span {
-    padding: 0 $space_xs;
+    padding: 0;
     display: flex;
+    [class*="pb_caption_kit"] {
+      padding: 0 $space_xs;
+    }
   }
   &::before {
     content: "";