Bump Razor to 10.0.0-preview.25454.5

[davidwengier]

Weekly bump

View Complete Diff of Changes

• Fix extra character insertion during attribute completion in VS Code (PR: #12177)
• Make sure we report no diagnostics where there are no diagnostics (PR: #12178)
• Reference a patched version of Microsoft.Build.Tasks.Core (PR: #12180)
• Fix task list items not showing (PR: #12169)
• Late feedback on Allow for weird Uris as file paths razor#12155 (PR: #12171)
• Remove FUSE feature flag from tooling and tooling tests (PR: #12166)
• Allow cohosting to be used when files aren't in projects (PR: #12170)
• Add test for renaming a local in a Razor document in cohosting (PR: #12090)
• Compiler: Don't eagerly create IntermediateNode.Children (PR: #12153)
• Avoid boxing ImmutableArray as IReadOnlyList or IEnumerable when calling helpers (PR: #12150)
• Compiler: Reduce allocations when writing line pragmas (PR: #12144)
• Compiler: Clean up and reduce allocations in ComponentBindLoweringPass (PR: #12143)
• Compiler: Introduce IntermediateNodeReference (PR: #12136)

[dibarbet]

(merging so I can do a roslyn update w/out conflicts :))