[Feature Request]: Allow configuring target origin of postMessage when recordCrossOriginIframes is enabled

[econte-sprig]

Preflight Checklist

• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

What package is this feature request for?

rrweb

Problem Description

Presently, when recordCrossOriginIframes is enabled, recording data is posted with postMessage with a target origin of '*'. As outlined in the docs this is a security concern.

Proposed Solution

rrweb should allow configuring the target origin of this message.

#1679

Alternatives Considered

None

Additional Information

No response