toolchain: build arm version as a multilib

[badochov]

JIRA: RTOS-1028

Description

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)
• Chore (refactoring, style fixes, git/CI config, submodule management, no code logic changes)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: (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).
  Makefile: adapt to being build as a multilib phoenix-rtos-kernel#641
  arm: adapt to being built as multilib libphoenix#409
• I will merge this PR by myself when appropriate.

[nalajcie]

looks ok, I'm just making sure I understand how it will work now

The base branch was changed.

[github-actions]

[codespell] _{reported by reviewdog 🐶}
orignal ==> original

[github-actions]

[codespell] _{reported by reviewdog 🐶}
interwined ==> intertwined

[github-actions]

Unit Test Results

7 010 tests   - 948   6 551 ✅  - 883   34m 42s ⏱️ - 5m 57s
  412 suites  -  58     459 💤  -  65 
    1 files   ±  0       0 ❌ ±  0 

Results for commit 4f880dc. ± Comparison against base commit 06a6db3.

This pull request removes 948 tests.

flash ‑ armv7a9-zynq7000-zedboard:flash
phoenix-rtos-tests/cpp/hello-cpp ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/cpp/hello-cpp
phoenix-rtos-tests/initfini/main ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/initfini/main
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.data_in
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.data_in_big
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.data_inout
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.data_inout_big
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.data_out
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.data_out_big
phoenix-rtos-tests/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.in_val
…

♻️ This comment has been updated with latest results.