[Aikido] Fix security issue in google.golang.org/grpc via minor version upgrade from 1.79.3 to 1.82.1

[aikido-autofix]

Upgrade grpc-go to fix authorization bypass in xDS RBAC, HTTP/2 Rapid Reset DoS, and server panic vulnerabilities.

✅ 1 CVE resolved by this upgrade

This PR will resolve the following CVEs:

Issue	Severity	Description
GHSA-hrxh-6v49-42gf	HIGH	[google.golang.org/grpc] Three vulnerabilities affect xDS RBAC authorization and HTTP/2 transport: authorization bypass when unsupported Metadata/RequestedServerName matchers are silently ignored, denial of service via HTTP/2 Rapid Reset mitigation bypass causing high CPU, and server panic when NOT rules wrap unsupported fields in RBAC policies.

🔗 Related Tasks

• https://theplanttokyo.atlassian.net/browse/MAINT-1498

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