[Spike] Investigate whether we can make tooltip font-size smaller

[weronikaolejniczak]

The purpose of this issue is to investigate if we can make tooltip font-size smaller.

Related to product requirement:

UX-5	Tooltip text is compact and proportional. Tooltip font size feels like supplemental information, not a callout.	Tooltips render at the same size as body text (~14px). A smaller ~12px variant exists but is undocumented and unused. Competitors use 12px or smaller.

Acceptance criteria

• Make a decision: do we want to make changes to the tooltip font styles and what exactly?
• Figma is updated accordingly

[JoseLuisGJ]

Adding the visual references:

14px	12px

[JoseLuisGJ]

Popover has also 14px font size by default, and we should consider to change it at the same time.