remove export themes as variables access from non pro users

[akshay-gupta7]

Why does this PR exist?

Closes #0000

What does this pull request do?

Testing this change

Additional Notes (if any)

[changeset-bot]

⚠️ No Changeset found

Latest commit: 866f1f9

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[github-actions]

⤵️ 📦 ✨ The artifact was successfully created! Want to test it? Download it here 👀 🎁

[github-actions]

Commit SHA:6bd8ce6dd28c9fc83757516d19109687d07e9520

Test coverage results 🧪

Code coverage diff between base branch:main and head branch: akshay/fix-non-pro-export-theme 

Status	File	% Stmts	% Branch	% Funcs	% Lines
🔴	total	62.94 (-0.01)	54.72 (-0.07)	60.02 (-0.02)	63.25 (-0.02)
🔴	packages/tokens-studio-for-figma/src/app/components/ManageStylesAndVariables/LabelledCheckbox.tsx	50 (0)	0 (-100)	0 (0)	50 (0)

[github-actions]

Commit SHA:6bd8ce6dd28c9fc83757516d19109687d07e9520
Current PR reduces the test coverage percentage by 1 for some tests