fix(Uploader): UXD-1995 zindex issue and disabled issue

[allison-c]

Purpose 🚀

https://aclgrc.atlassian.net/browse/UXD-1995

Notes ✏️

• Replaced defaultIsDisabled prop by isDisabled prop
• Added zIndex prop

why the change was made:

defaultIsDisabled can't be changed once mount.

👷 Moving from 3.x.x to 4.x.x:

If you didn't use defaultIsDisabled, you don't need to do anything. Otherwise:

Before:

<Uploader defaultIsDisabled={true} />

After:

<Uploader isDisabled={true} />

Updates 📦

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• indicate if changes were patch/minor/major for each modified package
• enter a release message

Storybook 📕

http://storybooks.highbond-s3.com/paprika/your-branch-name

Screenshots 📸

optional but highly recommended

References 🔗

relevant Jira ticket / GitHub issues

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 643ca9c91d4d018fbc8ee1a8dbc515514736791c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

| Name | Type | | ----------------- | ----- | | @paprika/uploader | Major |

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