fix(siblings): space icons out

[joshuaeilers]

A couple of notes for this PR:

• Search cards suffered from the same icon spacing issue as the new siblings autocomplete that was shown at town hall. The reason it was missed is that dbt/bigquery combo look fine together due to the unique design of those icons.
• I remember why I didn't reuse the search card logo component. It's currently a bit of tangled up component handling a lot of different icon rendering scenarios for different props (entityLogoComponent, platformLogoUrl, platformLogoUrls) and digging in and consolidating all of that would've taken more time than I had available for this project. For another day I suppose!

Search card after:

Autocomplete after:

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Autocomplete before:

Search card before:

[chriscollins3456]

nice!