fix: 🐛 component-id collision error NG0912

[matheo]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines: https://github.com/ngneat/spectator/blob/master/CONTRIBUTING.md#commit
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Running tests with Spectator 15.0.1 inside the latest Nx (16.6.0) it is throwing this warning:

NG0912: Component ID generation collision detected. Components '_HostComponent' and 'TestComponent'
with selector 'ng-component' generated the same component ID. To fix this, you can change the selector
of one of those components or add an extra host attribute to force a different ID.
Find more at https://angular.io/errors/NG0912

What is the new behavior?

I removed the warning adding a selector to HostComponent

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

Angular CLI: 16.1.6
Node: 18.16.1
Package Manager: npm 9.5.1
OS: linux x64

Angular: 16.1.7
... animations, common, compiler, compiler-cli, core, elements
... forms, language-service, platform-browser
... platform-browser-dynamic, router

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