chore: remove redundant code and update build tags

[tenthirtyam]

Summary

Ran golangci-lint run --fix to:

• Eliminates unnecessary blank lines and redundant code across multiple files to improve readability and maintainability.
• Updates Go build tags by removing legacy +build comments, standardizing on //go:build syntax for test files.

Updates linter configuration to use wsl_v5 with custom settings in .golangci.yml.

Type

• This is a bug fix.
• This is an enhancement or feature.
• This is a code style/formatting update.
• This is a documentation update.
• This is a refactoring update.
• This is a chore update
• This is something else.
  Please describe:

Breaking Changes?

• Yes, there are breaking changes.
• No, there are no breaking changes.

Test and Documentation

• Tests have been completed.
• Documentation has been added or updated.

Issue References

Additional Information

[Copilot]

Pull Request Overview

This PR performs automated code cleanup by removing redundant code and standardizing build tags across the codebase. The changes improve code maintainability and readability while ensuring compliance with modern Go conventions.

• Removes legacy // +build comments from 60+ test files, standardizing on //go:build syntax
• Eliminates unnecessary blank lines throughout the codebase to improve readability
• Updates linter configuration to use wsl_v5 with custom settings for whitespace management

Reviewed Changes

Copilot reviewed 104 out of 104 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Multiple test files (60+ files)	Removed legacy // +build build tag comments, keeping only //go:build directives
Multiple Go source files	Removed unnecessary blank lines between variable declarations and error checks to improve code flow
.golangci.yml	Updated linter from wsl to wsl_v5 with custom configuration and added staticcheck SA1019 exclusion
internal/models/kubernetessecret/clustergroup/*.go	Reformatted import statements to use multi-line format
Test files in internal/resources/*/tests/	Added blank lines in test functions to improve readability between test step blocks

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[github-actions]

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