[Icon] add LocationIssue and LocationValid icons

[JordanForeman]

WHY are these changes introduced?

resolves #11939
resolves #11938

WHAT is this pull request doing?

Adds a new icons to the polaris-icons package.

cc. @ksvihar

How to 🎩

🖥 Local development instructions
🗒 General tophatting guidelines
📄 Changelog guidelines

🎩 checklist

• Tested a snapshot
• Tested on mobile
• Tested on multiple browsers
• Tested for accessibility
• Updated the component's README.md with documentation changes
• Tophatted documentation changes in the style guide

[sethomas]

LGTM, might want to wait for a polaris engineer to approve!

[sam-b-rose]

Looks good! I've added a commit that cleans up the icon paths using the optimize script.

Also a few consistency suggestions to closer match the conventions in other icon YAML files.

[JordanForeman]

@sam-b-rose thanks for the suggestions and optimizations! I've incorporated your feedback on the yml files 😄

[alex-page]

@JordanForeman what is the timeline/urgency for these icons? We are building a new icon library to replace this one.

[ksvihar]

I just realised that the location icons are updated since we first created the icons. So, I just updated the icons and respective issues with to reflect the latest icon designs.

[JordanForeman]

@alex-page I'd say "medium" urgency? We're aiming for mid-May to start using this. I'm not sure we'll have time to include migration to a new icon library, depending on the costs associated with that.

[JordanForeman]

@ksvihar updated! See 0260716

[alex-page]

@JordanForeman is there any blockers or things stopping you from using the icons without polaris-icons until the new library is implemented?

[JordanForeman]

@alex-page nope 😄 I can just hardcode these for now, and we can keep tabs on how icons evolves.