chore(server): remove outdated ConfigAuthenticator

[ChoHee15]

Purpose of the PR

ConfigAuthenticator is now deprecated, and this PR removes the related content.

Main Changes

Verifying these changes

• Trivial rework / code cleanup without any test coverage. (No Need)
• Already covered by existing tests, such as (please modify tests here).
• Need tests and can be verified as follows:
  • xxx

Does this PR potentially affect the following parts?

• Dependencies (add/update license info & regenerate_known_dependencies.sh)
• Modify configurations
• The public API
• Other affects (typed here)
• Nope

Documentation Status

• Doc - TODO
• Doc - Done
• Doc - No Need

[Copilot]

Pull request overview

This PR removes the deprecated ConfigAuthenticator class and all related configuration options, simplifying the authentication system to focus on the StandardAuthenticator implementation. The changes eliminate outdated token-based authentication in favor of the password-based approach.

Key Changes

• Removed ConfigAuthenticator class and all references to it across the codebase
• Eliminated AUTH_ADMIN_TOKEN and AUTH_USER_TOKENS configuration options
• Updated documentation and configuration files to reflect StandardAuthenticator as the recommended authenticator
• Migrated GraphManager to use ADMIN_PA (admin password) instead of AUTH_ADMIN_TOKEN

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
hugegraph-struct/src/main/java/org/apache/hugegraph/options/AuthOptions.java	Removed AUTH_ADMIN_TOKEN and AUTH_USER_TOKENS config options; removed unused ConfigListOption import; updated AUTHENTICATOR description
hugegraph-server/hugegraph-dist/src/assembly/travis/run-api-test.sh	Updated sed command to use auth.admin_pa instead of auth.admin_token
hugegraph-server/hugegraph-dist/src/assembly/static/conf/rest-server.properties	Removed ConfigAuthenticator references and related config options from comments
hugegraph-server/hugegraph-core/src/main/java/org/apache/hugegraph/config/AuthOptions.java	Removed AUTH_ADMIN_TOKEN and AUTH_USER_TOKENS config options; updated AUTHENTICATOR description
hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/core/GraphManager.java	Changed to use ServerOptions.ADMIN_PA instead of AUTH_ADMIN_TOKEN for admin user initialization
hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/config/ServerOptions.java	Removed AUTH_ADMIN_TOKEN and AUTH_USER_TOKENS; corrected ADMIN_PA description; updated AUTHENTICATOR description
hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/auth/HugeFactoryAuthProxy.java	Removed ConfigAuthenticator from reflection filters and private action registrations
hugegraph-server/hugegraph-api/src/main/java/org/apache/hugegraph/auth/ConfigAuthenticator.java	Deleted entire deprecated ConfigAuthenticator class file
hugegraph-cluster-test/hugegraph-clustertest-dist/src/assembly/static/conf/rest-server.properties.template	Updated comments to remove ConfigAuthenticator references and added auth.admin_pa documentation
docker/configs/server3-conf/rest-server.properties	Updated authentication config comments to reflect StandardAuthenticator as default option
docker/configs/server2-conf/rest-server.properties	Updated authentication config comments to reflect StandardAuthenticator as default option
docker/configs/server1-conf/rest-server.properties	Updated authentication config comments to reflect StandardAuthenticator as default option

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[github-actions]

Due to the lack of activity, the current pr is marked as stale and will be closed after 180 days, any update will remove the stale label

[imbajin]

close by #2927