[Blazor] Update bundle generation to use Webpack 5

[javiercn]

For all the goodness it might bring and to make sure we are up to date with our dependencies

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[javiercn]

See #30320 for the signalr update to follow suit

[benaadams]

Second commit in #30320

However; additionally the blazor.server.js should be served compressed as either .br or .gz which it isn't currently.

In themesof.net I currently intercept the request; then compress and cache the compressed version in memory and serve that in second request etc https://github.com/terrajobst/themesof.net/blob/2e795379c7853c6cd271cf61ce07f282a5d37510/src/ThemesOfDotNet/Middleware/PrecompressedMiddleware.cs#L177-L210; however this should be precompressed and automatic

[benaadams]

Can more than half the size of blazor.server.js by switching msgpack5 to @msgpack/msgpack