feat: add scheduled Go version digest check workflow #544

Job	Run time
Check all go.mod files are in matrix	7s
Run govulncheck (pkgerrlint)	42s
Run govulncheck (.)	1m 35s
Run govulncheck (tools/azure-npm-to-cilium-validator)	55s
Run govulncheck (azure-ipam)	1m 5s
Run govulncheck (cilium-log-collector)	40s
Run govulncheck (zapai)	41s
Run govulncheck (azure-iptables-monitor)	1m 17s
Run govulncheck (bpf-prog/ipv6-hp-bpf)	1m 23s
Run govulncheck (dropgz)	40s
Run govulncheck (azure-ip-masq-merger)	45s
	9m 50s

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