DS-256 - search margin fix

[pesinasiller]

Pull request checklist

Please check if your PR fulfills the following requirements:

• Make sure you are requesting to pull a topic/feature/bugfix branch (right side). Don't request your master!
• Make sure you are making a pull request against the develop branch (left side). Also you should start your branch off our develop.
• Check the commit's or even all commits' message styles matches our requested structure.
• Check your code additions will fail neither code linting checks nor unit test.

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

Issue Number: N/A

What is the new behavior?

The Search component has a margin at the bottom of 20 px its causing that the component could not be aligned properly in a flex container

for the small Search variant, the icon size should be 16×16 rather than 20×20, to fully match the design specifications.

The Custom Results Rendering, it has a line at the bottom that seems not aligned with the actual end of the box

Does this introduce a breaking change?

• Yes
• No

Other information