devel/rubygem-google-apis-iam_v1: Update to 0.62.0

• Pass maintainership to ruby@ [1]
• Update WWW and clean up pkg-descr
• Use port without -gitlab suffix

Changes: https://github.com/googleapis/google-api-ruby-client/blob/main/generated/google-apis-iam_v1/CHANGELOG.md
Approved by: mfechner
Reference: https://lists.freebsd.org/archives/dev-commits-ports-main/2024-November/130901.html [1]