Switch Export and Import Icons to match intuition (#30805)

* switch upload and download icon

* adjust test

* run tests

* update screenshot

test/unit-tests/components/structures/__snapshots__/MatrixChat-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`<MatrixChat /> Multi-tab lockout shows the lockout page when a second tab opens after a session is restored 1`] = `
 <div>

test/unit-tests/components/structures/__snapshots__/MessagePanel-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`MessagePanel should handle large numbers of hidden events quickly 1`] = `
 <DocumentFragment>

test/unit-tests/components/structures/__snapshots__/RoomView-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`RoomView for a local room in state CREATING should match the snapshot 1`] = `
 <div>

test/unit-tests/components/structures/__snapshots__/SpaceHierarchy-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`SpaceHierarchy <SpaceHierarchy /> renders 1`] = `
 <DocumentFragment>

test/unit-tests/components/structures/__snapshots__/ThreadPanel-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`ThreadPanel Header expect that All filter for ThreadPanelHeader properly renders Show: All threads 1`] = `
 <DocumentFragment>