[Bug Report] STASH_BLOBS is an invalid env

[feederbox826]

Describe the bug
STASH_BLOBS is curiously missing from the envBinds, Maybe an oversight from the blob migration

Expected behavior
STASH_BLOBS is respected, along with _GENERATED, _METADATA, _CACHE

Screenshots

stash/internal/manager/config/init.go

Lines 36 to 46 in 3e4515e

	envBinds = map[string]string{
	"host": Host,
	"port": Port,
	"external_host": ExternalHost,
	"generated": Generated,
	"metadata": Metadata,
	"cache": Cache,
	"stash": Stash,
	"ui": UILocation,
	}
	)

Additional context
Seems to have been missed in #3187 and manifests itself in #3613