some code cleanup

[mojtaba-esk]

Summary by CodeRabbit

• Bug Fixes

  • Improved state management in the Destroy method to use state constants, enhancing stability.
  • Enhanced error handling in DeletePersistentVolumeClaim for non-existent claims.

• Refactor

  • Refined error handling for various functions in the Kubernetes module to improve reliability and maintainability.
  • Streamlined multiple internal methods and added constants for better code organization and readability.

• Style

  • Upgraded logger messages to include environment variable names and refactored code for clarity.

[coderabbitai[bot]]

Walkthrough

These changes improve code quality and maintainability across various packages by introducing constants for state handling and error messages, refining method signatures, enhancing error handling, and refactoring logging functionality. The updates involve adopting state constants, handling errors more precisely, simplifying function implementations, and making the codebase consistent by using defined constants for environment variables.

Changes

Files	Summary
pkg/errors/errors.go	Implemented the error interface for the Error struct.
pkg/instance/destroy.go	Updated state handling to use constants and function signatures to use pointers to Instance.
pkg/k8s/k8s_custom_resource_test.go	Removed errors import, replaced errors.New(...) with errInternalServerError, and cleaned up test cases.
pkg/k8s/k8s_pod.go	Introduced new constants, refactored functions, and enhanced error handling.
pkg/k8s/k8s_pvc.go	Added error handling for the case where a persistent volume claim does not exist.
pkg/k8s/k8s_rolebinding_test.go	Similar to k8s_custom_resource_test.go, removed errors import and used errInternalServerError.
pkg/k8s/test_suite_test.go	Added errInternalServerError for error handling within the test suite.
pkg/log/logger.go	Refactored logging to use a constant for the environment variable name and improved log messages formatting.

Poem

In the land of code, where bunnies hop, Refactoring brings a healthy crop. Constants and pointers, a tidy heap, Makes maintaining this code a simpler leap. Error handling now shines bright, Keeping logs precise and tight. 🌟

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[!TIP]

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