Azure kubelogin (CLI)

Enhancements

• remove snap since it's unsupported by @weinong in https://github.com/Azure/kubelogin/pull/564
• Add x5c Header when Acquiring PoP Tokens by @JorgeDaboub in https://github.com/Azure/kubelogin/pull/568

Maintenance

• Bump golang.org/x/crypto from 0.27.0 to 0.31.0 by @dependabot in https://github.com/Azure/kubelogin/pull/576

Full Changelog: https://github.com/Azure/kubelogin/compare/v0.1.5...v0.1.6