re-add migration and add tests for it & update core to 1.139.3

[Simon-Laux]

This revealed some crash issues on macOS with the new rpc server,
the versions that don't need a migration (only the migration that is done by core when opening the account manager) crash on open in the test somehow.

Also this revealed a bug in the core migration for the oldest version:

  16) migration from DeltaChat.0.840.0.fixed.AppImage works:
     failed to run migrations

Caused by:
    0: execute_migration failed for version 59
    1: unrecognized token: "",
       CREATE INDEX devmsglabels_index1 ON devmsglabels (label);" in ",
       CREATE INDEX devmsglabels_index1 ON devmsglabels (label); at offset 0
    2: Error code 1: SQL error or missing database

• fix migration function for the cases where it does not detect both accounts was broken testdata
• complete the test (test for account emails if both accounts are there)
• fix core
  • figgure out why it crashes, my suspicion is that the wrong absolute path is the culprit -> deltachat-rpc-server exits when opening accounts.toml with invalid absolute paths deltachat-core-rust#5599
  • fix the db migration: fix: db migration 59 and 27 deltachat-core-rust#5600