Spike: Investigate Merge commit with semi-linear history setting usage
### Problem to solve
To inform the direction of https://gitlab.com/groups/gitlab-org/-/epics/7705 it would be helpful to understand the usage of the `Settings -> Merge requests -> Merge method -> Merge commit with semi-linear history` setting to determine if customers find value in it as well as its use cases.
### Proposal
- Leverage customer usage data to determine if customers are applying the setting: analyze the distribution of all our merge methods across active* repos :
| | Merge commit | Merge commit with semi-linear history | Fast-forward merge |
| -------------------| ------------ | ------------------------------------- | ------------------ |
| %** of active repos | | | |
*Active could be defined as at least one merge request in the last 12 months.
**Let's make sure we use percentages as the absolute numbers may fall in the SAFE category.
- Consult with TAMs and customer service to find for the customers using the setting, what is their use case.
issue