Remove current iteration and current label from run models

[oyvindeide]

This sentralizes the iteration number, meaning that we dont have to keep the (correct) state individually in all the run models.

Run label was not being used, it was only pased on when events were being sent, so set it explicitly there instead.

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure tests pass locally (after every commit!)

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Create Backport PR to latest release

[sondreso]

💯

[sondreso]

Looks good with the extra commit as well!