chore: remove deprecated API and unused action

[xuthus5]

Key changes:

• Updated version declarations across all build configurations
• Remove deprecated API ioutil
• Prepare for adopting modern features (e.g., generics)

BREAKING CHANGE: Development environments must upgrade to Go 1.18+

Summary by CodeRabbit

• Refactor

  • Modernized file processing and HTTP request handling to align with current standards, ensuring smoother operations.

• Chores

  • Raised the platform version requirement to Go 1.18 and updated dependency configurations to enhance compatibility and stability.
  • Updated workflow configuration to utilize the latest setup-go action and dynamically determine the Go version from the go.mod file.

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Walkthrough

The update replaces deprecated file and response reading functions with their modern counterparts. The ConfigFile.Load method now uses os.ReadFile instead of ioutil.ReadFile, while the HTTP request function in protocol/http/request.go switches from ioutil.ReadAll to io.ReadAll and updates its URL parsing. Additionally, the go.mod file bumps the Go version from 1.13 to 1.18 and introduces several new indirect dependencies.

Changes

File(s)	Change Summary
env/.../json_config.go, protocol/.../request.go	Replaced deprecated ioutil functions with os.ReadFile/io.ReadAll; updated import statements and variable names (e.g., url2 to url and url to u) to follow newer Go conventions.
go.mod	Upgraded Go version from 1.13 to 1.18 and added multiple new indirect dependencies (e.g., fsnotify, hashicorp/hcl, magiconair/properties, mitchellh/mapstructure, go-toml, several spf13 packages, among others).
.github/workflows/go.yml	Updated setup-go action from v2 to v5 and changed Go version specification to use the version from go.mod instead of a hardcoded value.

Possibly related PRs

• feat：update version to go1.20 #322: The changes in the main PR and the retrieved PR are related through the modifications made to the go.mod file, specifically the updates to the Go version and the addition of indirect dependencies.

Suggested reviewers

• hezhangjian
• zouyx

Poem

I'm a rabbit in the coding glade,
Hopping over deprecated paths we've swayed.
New functions leap with modern flair,
Imports pruned with utmost care.
Tiny hops, big changes shine—
In Go's garden, all is fine!
🐰💻

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[mergify]

感谢您提出Pull Request，我会尽快Review。我会在1-2日内进行查看或者回复，如果遇到节假日可能会处理较慢，敬请谅解。

[xuthus5]

@nobodyiam PTAL.

[coveralls]

Pull Request Test Coverage Report for Build 14312814009

Details

• 4 of 4 (100.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 75.613%

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Totals
Change from base Build 14280364520:	0.0%
Covered Lines:	1327
Relevant Lines:	1755

---

💛 - Coveralls

[nobodyiam]

@xuthus5 Could you share your reasons for upgrading the Go toolchain to 1.18?

[xuthus5]

@xuthus5 Could you share your reasons for upgrading the Go toolchain to 1.18?

• Go 1.18 introduces generic support, so future development can benefit from upgrading to this release
• In the future, the Kubernetes configmap backup feature will be migrated to this repository. It is recommended that the Kubernetes client-go version be a later version.

[zouyx]

这次升级看上去是和之前版本不兼容的是吗？
意思是：如果用户目前使用的是1.14 是无法直接升级的是吗？

[mergify]

这个 PR 发生了冲突. @xuthus5 是否能帮忙修复呢? 🙏

[xuthus5]

这次升级看上去是和之前版本不兼容的是吗？
意思是：如果用户目前使用的是1.14 是无法直接升级的是吗？

是的，如果变更该代码仓go版本号为1.15，则用户1.14版本的项目无法使用最新发布的版本，也就是会使依赖该项目但是项目版本号低于当前代码仓go.mod中定义的版本号的项目，无法使用新的发布版本。

基于你的目标分支修改，我了解前面已经有人在develop分支将go版本号升级到1.20。
我在该分支做修正。

该次修改移除被弃用API与过时的action任务。