Show active filters in call hierarchy view

[r-mennig]

Currently, the call hierarchy view offers multiple ways to filter matches via the filter menu. The content description of the view however does not state which filters were active during the search.

Since these filters are also persisted between restarts, this might lead to confusion if a user forgets that certain filters are active during search.

What it does

This PR extends the content description of the call hierarchy view with a description of the active filters:

The description may include "in main code of" (if option "Hide Test Code" is active) or "in test code of" (if option "Test Code only" is active) prepended to the scope description and/or "(filter patterns: 'xyz')" (if "Qualified type name filter patterns" is non-empty and enabled) appended to the scope description.

How to test

1. Issue a call hierarchy search (e.g. by pressing Ctrl+Alt+H while selecting a member in the java editor)
2. Open the filter menu by pressing the filter button and select any option other than "Show all code"
3. The results get filtered, the scope description is updated depending on the selected filters

Author checklist

• I have thoroughly tested my changes
• The change is following the coding conventions
• I have signed the Eclipse Contributor Agreement (ECA)

[Copilot]

Pull request overview

This PR improves the Call Hierarchy view’s content description by including currently active filter settings, reducing confusion when filters persist across restarts and affect search results.

Changes:

• Extend Call Hierarchy view content description to prepend test/main-code scope qualifiers and append active filter pattern information.
• Add new NLS message keys for the filter-related description fragments.
• Add a new UI test verifying the updated content description and register it in the core test suite.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPart.java	Builds a scope description string that incorporates active filters/test-code options.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyMessages.properties	Adds localized strings for “main code”, “test code”, and active filter pattern suffix.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyMessages.java	Exposes the new NLS fields.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/ui/tests/core/CoreTestSuite.java	Registers the new test in the core test suite.
org.eclipse.jdt.ui.tests/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPartContentDescriptionTest.java	Adds coverage for the updated content description behavior.

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