[Self-hosted] Flags filtering is broken in the Tree view, when flag_regexes is added in component_management

[nikosatwork]

Describe the bug
[Self-hosted] Flags filtering is broken in the Tree view, when flag_regexes is added in component_management

Environment (please complete the following information):

• Browser: All
• System: CI, UI
• Version: 25.1.16, 25.1.3

To Reproduce
Steps to reproduce the behavior:

1. Setup a component(s) in component_management in codecov.yml, using both paths and flag_regexes, or just flag_regexes
2. Upload a new report that targets the component, as expected
3. Having selected the component in the Codecov dashboard > in Tree view, the coverage percentage is correct, based on the flag_regex and path union.
4. Still in the Tree view and having selected any flag in the Flags dropdown, the coverage percentage is wrong, and represents the total coverage, regardless the Component filter.

Expected behavior
Having selected a flag in the Flags dropdown, the coverage percentage is calculated based on the union of the path and flag_regex in component_management, or just the flag_regex when the path is not specified, and the flag(s) selected.