Add utf8 test cases + fix broken tag test cases

[hassandotcms]

Description

• Fix broken tests in v2 TagResourceIntegrationTest
• Add UTF-8/Unicode test coverage for create, rename, import, and export tag operations.

Acceptance Criteria

• All integration tests must pass for v2 tags including utf-8 support for tags

Priority

None

Additional Context

No response

[github-actions]

PRs linked to this issue

• 34817 add utf8 test cases and fix broken tag test cases by @hassandotcms