feat(portfolio): implement token cards relationship management

[yhabib]

Motivation

There is a relationship between the HeldTokensCard and the StakedTokensCard. Based on this relationship, we display or hide an additional row with a static message to achieve visual balance between the heights of the cards.
The logic for this can be found in #6181.

Live demo can be found here

Changes

• Updates HeldTokensCard to receive the number of staked tokens and determine whether to display the InfoRow.
• Updates the Portfolio page to provide the number of staked tokens to HeldTokens.
• Updates StakedTokensCard to utilize a new utility function for deciding whether to display the InfoRow.
• Includes some minor CSS changes.

Tests

• Update tests based on the new logic

Todos

• Add entry to changelog (if necessary).
  Not necessary

[mstrasinskis]

LGTM, thanks!