Update mermaid to v11 (#31913)

Update mermaid to
[v11](https://github.com/mermaid-js/mermaid/releases/tag/v11.0.0) and
enable the new [`suppressErrorRendering`
option](https://github.com/mermaid-js/mermaid/pull/4359) to ensure
mermaid never renders error elements into the DOM (we have per-chart
error rendering, so don't need it). Tested various chart types.

BTW, I was unable to reproduce that error rendering from mermaid with
`suppressErrorRendering: false` and I thought we had some CSS to hide
the error element, but I could not find it, not even in git history.

web_src/js/markup/mermaid.ts

@@ -20,6 +20,7 @@ export async function renderMermaid() {
     startOnLoad: false,
     theme: isDarkTheme() ? 'dark' : 'neutral',
     securityLevel: 'strict',
+    suppressErrorRendering: true,
   });
 
   for (const el of els) {