[9.x] Short attribute syntax for Blade Components

[pascalbaljet]

This PR implements Caleb's proposal to optionally allow a shorter syntax for passing attributes to Blade Components.

<!-- current syntax -->
<x-profile :user-id="$userId"></x-profile>

<!-- short syntax -->
<x-profile :$userId></x-profile>

[clementmas]

<x-profile :$userId />

[olivM]

it seems like it doesn't work for anonymous component (component with only a Blade template and no class)

[PerryvanderMeer]

It does work for anonymous components, but only for non-self-closing notations.
E.g.:

<!-- works... -->
<x-profile :$userId></x-profile>

<!-- broken... -->
<x-profile :$userId/>

[olivM]

is there a reason it doesn't work for self-closing ?

[PerryvanderMeer]

See #44413