Fixes #36629 - Add cvv synced to env created at on capsule sync page

[chris1984]

What are the changes introduced in this pull request?

• The published date should be for the version that's tied to the env in that capsule
• Before it was the last published date of the latest version of the CV

Considerations taken when implementing this change?

N/A

What are the testing steps for this pull request?

• Check out PR
• Create a CV, publish and promote it to an env associated with a smart-proxy so it syncs
• Go to Infrastructure --> Smart Proxies --> <your smartproxy) --> Content --> Expand environment
• Check if the created at matches the cv version synced to the env instead of the initial cv created at time

[theforeman-bot]

Issues: #36629

[sjha4]

Before PR (Published date shows latest version publish date):

After PR (Published date shows assigned version publish date):

Ack 👍🏼