deps: bump google.golang.org/grpc from 1.71.1 to 1.73.0 in /attestation-manager/src #487

Job	Run time
pre-checks	10s
pre-merge-root	-1s
pre-merge-pipeline (attestation-manager) / license-compliance-check	12s
pre-merge-pipeline (attestation-manager) / clamav-antivirus-scan	33s
pre-merge-pipeline (attestation-manager) / sanitize-project-folder	2s
pre-merge-pipeline (attestation-manager) / secrets-gitleaks-scan	8s
pre-merge-pipeline (attestation-manager) / zizimor-scan	8s
pre-merge-pipeline (attestation-manager) / trivy-critical-scan	20s
pre-merge-pipeline (attestation-manager) / bandit	16s
pre-merge-pipeline (attestation-manager) / semgrep	41s
pre-merge-pipeline (attestation-manager) / trivy-filesystem-scan	35s
pre-merge-pipeline (attestation-manager) / run-repo-pipelines	7m 16s
pre-merge-pipeline (attestation-manager) / scan-images (080137407410.dkr.ecr.us-west-2.amazonaws.com/edge-orch/trusted-compute/attestation-m...	45s
pre-merge-pipeline (attestation-manager) / scan-images (attestation-manager:1.4.4-dev-pr-94)	32s
final-check	3s
	11m 40s

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