massflash-generate-persist can download specific runs

[sarcasticadmin]

Description

relates to: #1002

Currently massflash-generate-persist only downloads the latest build:

scale-network/nix/package-sets/top-level/scale-network/massflash-generate-persist/src/massflash_generate_persist.py

Lines 36 to 45 in c395f2d

	"gh",
	"run",
	"list",
	"--repo=socallinuxexpo/scale-network",
	"--workflow=openwrt-build",
	"--status=completed",
	"--json",
	",".join(GhActionRun.model_fields.keys()),
	"--limit=1",
	"--jq=.[0]",

There are times were the latest build wont actually be the one we want to use for massflash. Scenarios like our weekly build might supersede a release build as latest come to mind

AC

• massflash-generate-persist is able to download specific runs from GHA