mirage/mirage: PR #1606: Use Git_net module instead of Git_mirage

@adbc3de

Stages:

• ❌ x86_64-debian-10-4.14 (1m43s)
• ❌ arm64-debian-10-4.14 (16s)
• ❌ x86_64-debian-10-5.2 (28s)
• ❌ arm64-debian-10-5.2 (21s)

History:

• 03/09/2025 11:28 🟠 @aa0434c
• 03/09/2025 09:14 ❌ @4dc4957 (8m52s)
• 18/05/2025 12:24 ❌ @adbc3de (52m48s)