Rollup merge of rust-lang#76389 - MaulingMonkey:pr-natvis-hashmap-vsc…

…, r=petrochenkov

Fix HashMap visualizers in Visual Studio (Code)

CDB (as used in unit tests) doesn't care that we're using static_cast between unrelated types (`u8*` to `tuple<$T1, $T2>*`).
Visual Studio & Visual Studio Code care.  These should've been reinterpret_cast or C casts.

Credit to @petrochenkov per rust-lang#76352 for helping catch this.

### Testing

```cmd
x.py test --stage 1 src/tools/tidy
x.py test --stage 1 --build x86_64-pc-windows-msvc src\test\debuginfo
```

src/etc/natvis/libstd.natvis

@@ -41,7 +41,7 @@
           <If Condition="(base.table.ctrl.pointer[i] &amp; 0x80) == 0">
             <!-- Bucket is populated -->
             <Exec>n--</Exec>
-            <Item Name="{static_cast&lt;tuple&lt;$T1, $T2&gt;*&gt;(base.table.ctrl.pointer)[-(i + 1)].__0}">static_cast&lt;tuple&lt;$T1, $T2&gt;*&gt;(base.table.ctrl.pointer)[-(i + 1)].__1</Item>
+            <Item Name="{((tuple&lt;$T1, $T2&gt;*)base.table.ctrl.pointer)[-(i + 1)].__0}">((tuple&lt;$T1, $T2&gt;*)base.table.ctrl.pointer)[-(i + 1)].__1</Item>
           </If>
           <Exec>i++</Exec>
         </Loop>
@@ -65,7 +65,7 @@
           <If Condition="(map.base.table.ctrl.pointer[i] &amp; 0x80) == 0">
             <!-- Bucket is populated -->
             <Exec>n--</Exec>
-            <Item>static_cast&lt;$T1*&gt;(map.base.table.ctrl.pointer)[-(i + 1)]</Item>
+            <Item>(($T1*)map.base.table.ctrl.pointer)[-(i + 1)]</Item>
           </If>
           <Exec>i++</Exec>
         </Loop>