feat: ci retry logic

[zvdy]

Context

While testing locally, I've bumped into this issue:

 go: github.com/GoogleCloudPlatform/kubectl-ai/pkg/sandbox imports
	k8s.io/api/core/v1 imports
	github.com/gogo/protobuf/proto: github.com/gogo/protobuf@v1.3.2: read "https://proxy.golang.org/github.com/gogo/protobuf/@v/v1.3.2.zip": stream error: stream ID 137; INTERNAL_ERROR; received from peer
go: github.com/GoogleCloudPlatform/kubectl-ai/pkg/sandbox imports
	k8s.io/api/core/v1 imports
	github.com/gogo/protobuf/sortkeys: github.com/gogo/protobuf@v1.3.2: read "https://proxy.golang.org/github.com/gogo/protobuf/@v/v1.3.2.zip": stream error: stream ID 137; INTERNAL_ERROR; received from peer
Error: Process completed with exit code 1.

• Failed run
• Success retry

Related to runner network problem, the fix is to retry, but adding it to the script seems more suitable than manual retries.