databases/mongodb70: update to 7.0.0 release

Changes: https://www.mongodb.com/docs/v7.0/release-notes/7.0/

• version bump
• new option ARMV80A to support older ARM cpus like Raspberry Pi 4
• pet portclippy and portfmt
• poudriere stage-qa: ok

As upstream has stopped supporting non-LSE ARM cpus I'm adapting
the port also. The option ARMV80A is for backwards compatibility,
but use at your own risk. See pkg-message for more info.