FIO-9992: check for server when triggering the captcha

[brendanbond]

Link to Jira Ticket

https://formio.atlassian.net/browse/FIO-9992

Description

We're still using @formio/js for email rendering on the server (soon to change!) and it appears that the captcha trigger is causing problems, namely because the Captcha component appears to the server as a Hidden component. I'm not sure if this is because the vm library is not properly loading premium components or what, but because this is a blocker right before release and because presumably you shouldn't need to trigger the captcha component just to render an email, I've gone ahead and gated the captcha trigger to client-side stuff only.

Breaking Changes / Backwards Compatibility

n/a

Dependencies

n/a

How has this PR been tested?

n/a

Checklist:

• I have completed the above PR template
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (if applicable)
• My changes generate no new warnings
• My changes include tests that prove my fix is effective (or that my feature works as intended)
• New and existing unit/integration tests pass locally with my changes
• Any dependent changes have corresponding PRs that are listed above