Merged PR 3967: Adds an "All History" time window to Account Margin

# Description

Quick improvement to be able to report the same setup of metrics by considering all account history up to a certain date.

It adds a new computation flow for this All History window. Note that I needed to update the macro to override this case by using unbounded preceding.

I also took the opportunity to update the exposures of the new report.

# Checklist

- [X] The edited models and dependants run properly with production data.
- [X] The edited models are sufficiently documented.
- [X] The edited models contain PK tests, and I've ran and passed them.
- [X] I have checked for DRY opportunities with other models and docs.
- [X] I've picked the right materialization for the affected models.

# Other

- [ ] Check if a full-refresh is required after this PR is merged.

Related work items: #26085

models/reporting/general/schema.yml

@@ -1406,6 +1406,7 @@ models:
           - not_null
           - accepted_values:
               values:
+                - All History
                 - Previous 12 months
                 - Previous 6 months
                 - Previous 3 months