All agents with capability requirement "mac-catalina/ios" are down.
smoke_catalina_hot_mode_dev_cycle_ios__benchmark and smoke_catalina_start_up_ios haven't run for awhile (weeks?)

It looks like most of the LUCI bots are running on Catalina (10.15) which is exercising that host OS pretty well.

We should either remove the tests:

• Swap the smoke_catalina_hot_mode_dev_cycle_ios__benchmark capability to mac/ios and ideally rename to hot_mode_dev_cycle_ios__benchmark if there's some way to do that without breaking benchmarking and release branches.
• Swap smoke_catalina_start_up capability to mac/android and ideally rename to flutter_gallery_<something>__start_up without breaking benchmarks.
• Remove smoke_catalina_hot_mode_dev_cycle__benchmark since the mac/android combo is covered by hot_mode_dev_cycle__benchmark.
• Remove smoke_catalina_start_up_ios since it's already covered by flutter_gallery_ios__start_up.

Or bring the agent back up if these tests are valuable.

Introduced in #39300.