[runtime] Add the JSCallRuntime opcode to TryGetScopeInfo

ClusterFuzzer found that a context can be created by
a call to the runtime when checking for context extensions
on the bytecode graph builder.

That happens in large contexts.

Bug: chromium:1019069
Change-Id: I7ab66dceedd56476ab972d7998ef4ca6896dc868
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1886691Reviewed-by: Georg Neis <neis@chromium.org>
Commit-Queue: Georg Neis <neis@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Cr-Commit-Position: refs/heads/master@{#64605}

src/compiler/bytecode-graph-builder.cc

@@ -1622,6 +1622,8 @@ base::Optional<ScopeInfoRef> BytecodeGraphBuilder::TryGetScopeInfo() {
     case IrOpcode::kJSGeneratorRestoreContext:
     case IrOpcode::kOsrValue:
     case IrOpcode::kPhi:
+    // For a large context, the runtime call is still used.
+    case IrOpcode::kJSCallRuntime:
       return base::nullopt;
     default:
       UNREACHABLE();