Prepare for next release

[Darchiv]

Cherry-pick changes from master:

• phoenix-rtos-build 27278d1...8658e67 (3):

  toolchain: fix arm cortex subvariant check
  toolchain: fix arm cortex subvariant check
  toolchain: fix arm crtstuff .data in PIC mode

• phoenix-rtos-devices 3b4a2ab...9fa3d94 (5):

  stm32l4-multi: handle dma TC and HT in single callback
  stm32l4-multi: disable RXNE interrupt when using DMA
  stm32l4-multi/libuart: disable DMA channel when reconfiguring UART
  stm32l4-multi/libuart: refactor
  stm32l4-multi/libuart: fix initialization order

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).
• I will merge this PR by myself when appropriate.

[github-actions]

Unit Test Results

     1 files  ±    0   1 554 suites  +102   1h 58m 41s ⏱️ + 13m 29s
20 356 tests +1 114  17 165 ✅ +990  3 191 💤 +124  0 ❌ ±0 
20 542 runs  +1 114  17 312 ✅ +990  3 230 💤 +124  0 ❌ ±0 

Results for commit 0ecbdcb. ± Comparison against base commit df4e848.