WIP: implicit m2m relationships referential actions

[miguelff]

Not ready to be reviewed yet

Fixes https://github.com/prisma/prisma/issues/16390 To be shipped along doc changes in https://github.com/prisma/docs/pull/4200

Implements the following requirements for implicit m2m relationships exist, and relationMode=prisma

• [ ] deleting one record on either side of the relationship should cascade to the pivot table
• [ ] deleting many records on either side of the relationship should cascade to the pivot table
• [ ] updating the PK for one record on either side of the relationship should cascade to the pivot table
• [ ] updating the PK for many records,on either side of the relationship should cascade to the pivot table

[codspeed-hq[bot]]

CodSpeed Performance Report

Merging #3469 fix/16390 (d4d90f3) will not alter performances.

Summary

🔥 0 improvements ❌ 0 regressions ✅ 11 untouched benchmarks

🆕 0 new benchmarks ⁉️ 0 dropped benchmarks