libc: re-enable tests for floats

[jmaksymowicz]

Re-enable tests related to issues #703, #704, #634, #652, #681

These issues were fixed by phoenix-rtos/libphoenix#370

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 stdlib, stdio: improve float string parsing libphoenix#370
• I will merge this PR by myself when appropriate.

[github-actions]

Unit Test Results

6 720 tests   - 1 003   6 134 ✅  - 874   31m 5s ⏱️ - 5m 41s
  386 suites  -    57     482 💤  - 233 
    1 files   ±    0     104 ❌ +104 

For more details on these failures, see this check.

Results for commit c4f4d0e. ± Comparison against base commit 0cd1f36.

This pull request removes 1004 and adds 1 tests. Note that renamed tests count towards both.

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
…

phoenix-rtos-tests/libc/scanf ‑ armv7m4-stm32l4x6-nucleo:phoenix-rtos-tests/libc/scanf

♻️ This comment has been updated with latest results.