ARR: Add secondary reviewer field to review form

[haroldrubio]

Include the following field in the official review:

"secondary_reviewer": {
"value": {
"param": {
"type": "profile[]",
"regex": "^~\\S+$|([a-z0-9_\\-\\.]{1,}@[a-z0-9_\\-\\.]{2,}\\.[a-z]{2,},){0,}([a-z0-9_\\-\\.]{1,}@[a-z0-9_\\-\\.]{2,}\\.[a-z]{2,})",
"optional": true
}
},
"description": "If another person contributed significantly to this review, please indicate their OpenReview profile ID here. If they do not have a profile, please ask them to create one. Note that only EICs, SAEs, and AEs can see this field - other reviewers cannot. (optional)",
"order": 16,
"readers": [
"[aclweb.org/ACL/ARR/2024/October/Program_Chairs](http://aclweb.org/ACL/ARR/2024/October/Program_Chairs)",
"[aclweb.org/ACL/ARR/2024/](http://aclweb.org/ACL/ARR/2024/)October/Submission${7/content/noteNumber/value}/Senior_Area_Chairs",
"[aclweb.org/ACL/ARR/2024/](http://aclweb.org/ACL/ARR/2024/)October/Submission${7/content/noteNumber/value}/Area_Chairs",
"${4/signatures}"
]
}