Improves MR refactor getters and state and adds specs

What does this MR do?

• Exports getters individually and adds proper testing + adds specs to the missing ones
• Exports state as an object so we can write proper specs.
• Reduces data being provided down by moving commitId to a getter

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Tests added for this feature/bug
• Conform by the code review guidelines
  • Has been reviewed by a Frontend maintainer

What are the relevant issue numbers?

Closes #48937 (closed)