Update Qt6 deps in package.xml

[iche033]

🦟 Bug fix

Fixes gazebosim/gz-sim#2993

Depends on:

• Add Qt6 svg, qt5-compat, base-private and declarative-private packages ros/rosdistro#47214
• Add more qml6-module-* packages ros/rosdistro#47215

Updated to use Qt6 deps.

Checklist

• Signed all commits for DCO
• Added tests
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers
• Was GenAI used to generate this PR? If so, make sure to add "Generated-by" to your commits. (See this policy for more info.)

Generated-by: Remove this if GenAI was not used.

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by and Generated-by messages.