fix(PM-2917, PM-2927): remove unneccessary prop for ai reviewer

[hentrymartin]

What's in this PR?

• This change addresses an issue in the draft saving process of challenges where the "type" property was being sent in the reviewer object even when the reviewer had isMemberReview set to false.
• The fix was implemented in the updateAllChallengeInfo method of the ChallengeEditor component. Before sending the challenge data for saving, the reviewers array is processed to remove the "type" property from any reviewer object where isMemberReview is false. This ensures the backend receives the correct data format and prevents potential errors or inconsistencies.
• Removed the logic of removing the phase name which was already selected in another review configuration for AI reviewers.

Ticket link - https://topcoder.atlassian.net/browse/PM-2917, https://topcoder.atlassian.net/browse/PM-2927