Resolve warnings by allowing fragments to be passed in string props, etc

[lily-peng]

Resolve warnings by allowing fragments to be passed in string props, and more sizes for Decorators

• Carbon for IBM Products (or Carbon for IBM Cloud & Cognitive)
• Legacy/CDAI
• Legacy/Security

Detailed description

Hi all, we'd like some warnings handled that are being logged in the console with our IBM Products components.

In the ProductiveCard title prop, we are passing a fragment containing an icon and a string instead of just a string so we can match the design given to us.

Similarly with our OptionsTile component, in the summary prop we are passing in an HTML fragment to showcase date, time, etc but it expects a string.

Lastly, in the security Decorator component, there's a console warning when we use it with size 20, we'd like for it to accept sizes other than just 12 and 16.

Our components look and function just fine, but we just want these warnings in the console resolved. Thanks.

[elycheea]

@lily-peng Can you check that #2728 resolves the same issue you were having with the ProductiveCard?