feat: remove unnecessary actions

[netanelC]

Simplify and Modernize GitHub Actions

This PR overhauls our GitHub Actions workflows to improve maintainability, security, and simplicity by adopting current best practices.

Key Changes

• Removed Custom Docker Actions: The proprietary actions for Docker login, build, and push have been removed. They are replaced by the official, open-source docker/login-action and docker/build-push-action (refer to this PR). This makes our CI pipeline more standard and easier for new contributors to understand.

• Eliminated Redundant Actions: Removed workflow steps that didn't provide significant value over a simple run command. For instance, the dedicated ESLint action was replaced with a direct call to npm run lint, reducing unnecessary dependencies.

• Updated to Major Version Pinning: Action versions are now pinned to their major release (e.g., actions/checkout@v4 instead of actions/checkout@v4.1.1). This practice ensures we automatically receive the latest non-breaking features and security patches without requiring manual intervention for every minor update.

[Copilot]

Pull Request Overview

This PR modernizes and simplifies the GitHub Actions workflows by removing redundant custom actions and adopting standard practices for action version pinning.

• Removes custom Docker actions in favor of official docker/build-push-action and docker/login-action
• Eliminates redundant actions that can be replaced with simple run commands (ESLint, OpenAPI lint)
• Updates action version references from specific SHA commits to major version pinning (e.g., @v4, @v5)

Reviewed Changes

Copilot reviewed 36 out of 36 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
test/ files	Removes test assets that were used for the eliminated actions
actions/eslint/, actions/openapi-lint/, actions/push-docker/, actions/build-docker/, actions/artifactory-login/	Completely removes custom actions that are being replaced by official alternatives
actions/helm-lint/action.yaml	Updates action versions to major version pinning and renames input parameter
actions/init-npm/action.yaml	Updates Node.js default version and action versions to major version pinning
actions/build-and-push-helm/action.yaml	Updates step names and variable references for consistency
actions/update-artifacts-file/action.yaml	Updates checkout action to major version pinning
.github/workflows/ files	Updates test workflows to use official Docker actions and major version pinning
README.md	Updates documentation to reflect removed actions

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[michalby24]

Nice Work