chore(tests): migrate from goridge rpc to connectrpc

[rustatian]

Summary

• Migrate tests/storage_plugin_test.go from net/rpc + goridge/v4/pkg/rpc codec to the generated kvV2connect client (mirrors the memcached and jobs plugin references)
• Bump goridge/v4 beta.1 → beta.2 transitively (no longer a direct dep; new wire is Connect/HTTP-2 served by rpc/v6 beta.4 on the same TCP socket)
• Bump api-go/v6 beta.4 → beta.12 (brings in kvV2connect)
• Add connectrpc.com/connect v1.20.0 + golang.org/x/net for h2c transport
• Modernize 4× WaitGroup goroutine spawn to wg.Go(...) (Go 1.25+)

Test plan

• go build ./... in both module roots
• go vet ./... in both module roots
• gofmt -l . clean
• golangci-lint clean (pre-commit hook)
• CI: go test -race -count=1 ./... against live redis (TLS + plain)

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 0d93d7b5-4dde-4ddb-add2-0583599ebfd3

📥 Commits

Reviewing files that changed from the base of the PR and between 4458a15 and 2c97248.

⛔ Files ignored due to path filters (2)

• go.sum is excluded by !**/*.sum
• tests/go.sum is excluded by !**/*.sum

📒 Files selected for processing (4)

• .github/workflows/linux.yml
• go.mod
• tests/go.mod
• tests/storage_plugin_test.go

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch chore/connectrpc-migration

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[Copilot]

Pull request overview

This PR updates the tests module’s KV integration tests to use the generated Connect RPC client instead of the legacy net/rpc + Goridge codec, aligning the tests with the newer Connect/HTTP-2 RPC surface.

Changes:

• Migrated tests/storage_plugin_test.go from net/rpc (Goridge codec) to kvV2connect.KvServiceClient calls using connect.NewRequest(...).
• Updated test-module dependencies to api-go/v6 v6.0.0-beta.12 (for kvV2connect), added connectrpc.com/connect and golang.org/x/net/http2 for h2c transport, and bumped rpc/v6 to v6.0.0-beta.4.
• Modernized goroutine spawning in tests to wg.Go(...) and updated module/toolchain metadata + sums accordingly.

Reviewed changes

Copilot reviewed 3 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
tests/storage_plugin_test.go	Switches KV RPC test calls to Connect client over HTTP/2 (h2c) and modernizes WaitGroup goroutine spawning.
tests/go.mod	Adds Connect + x/net deps, bumps RoadRunner API/RPC versions, and updates toolchain patch version.
tests/go.sum	Updates sums to reflect the new Connect + HTTP/2 dependency graph and RoadRunner version bumps.
go.mod	Bumps golang.org/x/sys to v0.45.0 in the main module.
go.sum	Adds checksums for the updated golang.org/x/sys v0.45.0.

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