Add `suppress-summary` flag to model test command #1390

Job	Run time
Tests	1m 27s
Lints	33s
Shellcheck	3s
Security Audits	16s
Test Release Process	4m 5s
goreleaser	0s
image-provenance	0s
binary-provenance	0s
verification-with-slsa-verifier	0s
verification-with-cosign	0s
	6m 24s

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