Bump timeout on google_network_services_edge_cache_origin to 60m

[modular-magician]

Live tests seem to time out, while VCR punchthrough fails for other reasons: https://ci-oss.hashicorp.engineering/buildConfiguration/GoogleCloudBeta_ProviderGoogleCloudBetaMmUpstreamVcr/207897

This should at least hopefully get them on the same page.

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Release Note Template for Downstream PRs (will be copied)

networkservices: boosted the default timeout for google_network_services_edge_cache_origin from 30m to 60m

Derived from GoogleCloudPlatform/magic-modules#5252