cleanup: Add more alert factories for use in SystemStatus.SubwayTests #5792

Job	Run time
file_changes	4s
Build application and assets	5m 59s
Build Docker image	7m 8s
Linting / TypeScript	35s
Formatting / Elixir	3m 10s
Linting / Elixir	3m 26s
Formatting / JavaScript & TypeScript	35s
Unit tests / JavaScript / Mocha	38s
Unit tests / JavaScript & TypeScript / Jest	2m 19s
Linting / JavaScript	23s
Linting / CSS	32s
Type checks / Elixir	3m 51s
Type checks / TypeScript	39s
Unit tests / Elixir / mix coveralls.html	1m 12s
	30m 31s

Provide feedback