[Feature] Chart By Tag filter

[ajanikow]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a new feature that allows filtering Helm charts by tag annotations. The implementation introduces a GetByTag method to the chart manager repository interface that can retrieve chart versions based on tag values stored in chart annotations.

• Adds a new GetByTag method to the ChartManagerRepo interface for tag-based chart filtering
• Implements the method to filter charts by the HelmLabelTag annotation and return the most recent matching version
• Includes test coverage for the new functionality

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
pkg/util/constants/helm.go	Adds the HelmLabelTag constant for chart tag annotations
pkg/util/k8sutil/helm/chart_manager_repo.go	Implements the GetByTag method with filtering and sorting logic
pkg/util/k8sutil/helm/chart_manager_test.go	Adds test case for the new tag-based chart filtering functionality
CHANGELOG.md	Documents the new Chart By Tag filter feature

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