Update Blazor Hybrid templates to latest Blazor Web template contents

[Eilon]

Stuff to update:

• Update Bootstrap
• Update contents in Razor/CSS/HTML/other files

Need to do this for:

• Blazor Hybrid project template
• Blazor Hybrid + Web app solution template

Things to consider:

• How much Bootstrap files should we include in the .NET MAUI templates? In Blazor Web there's no big downside to including extra files that aren't used (they just sit on the web server). But in mobile/desktop apps there is a cost for every user to download them and take storage space, even if they're not used.

[mattleibow]

Fixed in #31521