feat: add scheduled Go version digest check workflow #542

Job	Run time
Check all go.mod files are in matrix	6s
Run govulncheck (.)	1m 41s
Run govulncheck (dropgz)	41s
Run govulncheck (pkgerrlint)	41s
Run govulncheck (azure-ip-masq-merger)	46s
Run govulncheck (azure-iptables-monitor)	1m 27s
Run govulncheck (bpf-prog/ipv6-hp-bpf)	1m 19s
Run govulncheck (azure-ipam)	1m 9s
Run govulncheck (zapai)	46s
Run govulncheck (cilium-log-collector)	45s
Run govulncheck (tools/azure-npm-to-cilium-validator)	1m 0s
	10m 21s

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