fix: Solve the conflict problem of introducing multiple versions of knadh

[panlei-coder]

1bf4369 该 pr 引入了 knadh 两个版本 v1.5.0 和 v2.1.2，seata-go-sample 中引入的是 v1.4.4 版本，导致多个不同的版本引入冲突。通过 go mod graph 查看了项目中库的依赖关系，主要是 dubbo-go 中依赖 knadh，目前最新版本的 dubbo-go 引入的是 v1.5.0，所以将 dubbo-go 的版本升级到了 v3.1.1，knadh 统一成了 v1.5.0。

seata-go-sample pr ： apache/incubator-seata-go-samples#60

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[AlexStocks]

Pls fix the ci failure

[r1ngtone]

Perhaps you can add the following step above - name: "golang ci lint" to resolve the issue:

- name: Download Go modules
        run: |
          go clean -modcache
          go mod download

[AlexStocks]

@panlei-coder please fix the ci failure

[Copilot]

Pull Request Overview

This PR resolves dependency conflicts by unifying the knadh/koanf version used across the seata-go project and its samples by upgrading dubbo-go and removing an outdated knadh/koanf/v2 dependency. Key changes include updating import statements in pkg/client/config.go, modifying go.mod to remove the v2 dependency, and disabling caching in the GolangCI-Lint workflow.

Reviewed Changes

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

File	Description
pkg/client/config.go	Updated the import to use knadh/koanf v1.5.0 by removing the alias for the v2 package
go.mod	Removed dependency on github.com/knadh/koanf/v2 to enforce usage of v1.5.0
.github/workflows/golangci-lint.yml	Disabled caching with skip-cache and skip-pkg-cache flags to ensure fresh linting runs

Comments suppressed due to low confidence (3)

go.mod:41

• The removal of the v2 dependency is intentional to resolve conflicts; please confirm that there are no residual references to the v2 API elsewhere in the project.

github.com/knadh/koanf/v2 v2.1.2

pkg/client/config.go:29

• Ensure that the change from importing knadh/koanf/v2 to knadh/koanf v1.5.0 is fully consistent with the API usage in this file, and verify that no functions exclusive to the v2 API are still being used.

"github.com/knadh/koanf"

.github/workflows/golangci-lint.yml:61

• Disabling cache may slow down CI runs; ensure that this configuration change is intentional and its impact on build times is acceptable.

skip-cache: true