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

* switch upload and download icon

* adjust test

* run tests

* update screenshot

test/unit-tests/components/views/messages/__snapshots__/DateSeparator-test.tsx.snap

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

test/unit-tests/components/views/messages/__snapshots__/MBeaconBody-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`<MBeaconBody /> when map display is not configured renders maps unavailable error for a live beacon with location 1`] = `
 <div

test/unit-tests/components/views/messages/__snapshots__/MPollBody-test.tsx.snap

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

test/unit-tests/components/views/messages/__snapshots__/RoomPredecessorTile-test.tsx.snap

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

test/unit-tests/components/views/messages/__snapshots__/TextualBody-test.tsx.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`<TextualBody /> renders formatted m.text correctly italics, bold, underline and strikethrough render as expected 1`] = `
 <div