Add IPv6 support

[mateuszkobak]

Description

Enable IPv6 and ping6 in busybox

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: ia32-generic-qemu (list targets here).

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
  Add support for IPv6 phoenix-rtos-lwip#93
  Add support for IPv6 libphoenix#355
  busybox: add IPv6 support phoenix-rtos-ports#75
  submodule update #1184
• I will merge this PR by myself when appropriate.

[github-actions]

Unit Test Results

7 723 tests  ±0   7 008 ✅ ±0   37m 7s ⏱️ -4s
  443 suites ±0     715 💤 ±0 
    1 files   ±0       0 ❌ ±0 

Results for commit b55b7c8. ± Comparison against base commit 03c05cc.

♻️ This comment has been updated with latest results.

[mateuszkobak]

I ignore linter suggestions in _projects/ia32-generic-qemu/lwip/lwipopts.h, since this file is copied from phoenix-rtos-lwip with minor changes