Add beta check to Workspaces page

[TomatoToaster]

@johnmlee101, please review when you get the chance.

Details

Add Beta Check to workspaces page. These changes don't to be CP'ed because these pages aren't functional if you aren't in the beta and also if you haven't already created a workspace. However you can still access new.expensify.com/workspace and if you somehow knew the URL you shouldn't see that page. It'll look unfunctional since there's no sidebar:

This is valuable for us because switching between accounts that are in beta and outside of beta (if you were on the workspace settings page last) won't redirect you to the regular chat page, but show you this weird unfunctional modal instead modal instead.

Fixed Issues

$ https://github.com/Expensify/Expensify/issues/172009

Tests

Locally all betas should be active, so these steps were used to verify this works

1. Change this line to get rid of the || canUseAllBetas(betas) so that your local dev account doesn't have access to the beta.
2. Go to localhost:8080/workspace and localhost:8080/workspace/undefined/people and localhost:8080/workspace/undefined/card
3. Verify all 3 of those links bring you back to a regular chat page and does not open a blank modal like in the screenshots below.

QA Steps

Don't need to test the people page portion of this because you can't really be in a workspace

1. Log in with an account that is NOT in the freePlan beta
2. Go to staging.new.expensify.com/workspace and make sure you can't see a modal like this (you should get redirected to chat like you just logged in):
   
3. Go to staging.new.expensify.com/workspace/undefined/card and verify you do not see a modal like above
4. Go to staging.new.expensify.com/workspace/undefined/people and verify you do NOT see a modal like this:
   

Tested On

Only affects web.

• Web
• Mobile Web
• Desktop
• iOS
• Android

Screenshots

Included in QA steps.

[johnmlee101]

I think this looks good!

[OSBotify]

✋ This PR was not deployed to staging yet because QA is ongoing. It will be automatically deployed to staging after the next production release.

[OSBotify]

🚀 Deployed to staging in version: 1.0.80-3🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅

[OSBotify]

🚀 Deployed to production in version: 1.0.81-4🚀

platform	result
🤖 android 🤖	success ✅
🖥 desktop 🖥	success ✅
🍎 iOS 🍎	success ✅
🕸 web 🕸	success ✅