Support fully qualified refs for graphs view

What does this MR do and why?

Support fully qualified refs for graphs view

• updates Projects:NetworkController to handle ref_type
• refactors tests

Contributes to: #219583 (closed)

How to set up and validate locally

1. Enable the use_ref_type_parameter feature flag
2. Set up a project
3. checkout a new branch with some commits and push
4. checkout the previous branch, add a tag and push tags For example

git checkout -b "ambiguous-ref-name"
touch somefile.md
git add somefile.md
git commit -m "A commit"
git push origin ambiguous-ref-name
git checkout main
git tag ambiguous-ref-name
git push --tags

5. Go to the graphs/networks page

6. Try switching between tag and branch refs and see that a different node is indicated in the graph

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.

Related to #219583 (closed)