Restructure Core tests

[JonatanAntoni]

• Move tests into src subfolder
• Use temp directory for intermediate object files
• Include test report in matrix summary

[github-actions]

Test Results

     348 files  ±0       348 suites  ±0   8m 10s ⏱️ -2s
       49 tests ±0         44 ✔️ ±0         5 💤 ±0  0 ❌ ±0 
17 052 runs  ±0  11 076 ✔️ ±0  5 976 💤 ±0  0 ❌ ±0 

Results for commit 4c82702. ± Comparison against base commit f44ff7b.

This pull request removes 49 and adds 49 tests. Note that renamed tests count towards both.

CMSIS-Core.CMSIS-Core ‑ apsr.c
CMSIS-Core.CMSIS-Core ‑ basepri.c
CMSIS-Core.CMSIS-Core ‑ bkpt.c
CMSIS-Core.CMSIS-Core ‑ clrex.c
CMSIS-Core.CMSIS-Core ‑ clz.c
CMSIS-Core.CMSIS-Core ‑ control.c
CMSIS-Core.CMSIS-Core ‑ cp15.c
CMSIS-Core.CMSIS-Core ‑ cpsr.c
CMSIS-Core.CMSIS-Core ‑ dmb.c
CMSIS-Core.CMSIS-Core ‑ dsb.c
…

CMSIS-Core.src ‑ apsr.c
CMSIS-Core.src ‑ basepri.c
CMSIS-Core.src ‑ bkpt.c
CMSIS-Core.src ‑ clrex.c
CMSIS-Core.src ‑ clz.c
CMSIS-Core.src ‑ control.c
CMSIS-Core.src ‑ cp15.c
CMSIS-Core.src ‑ cpsr.c
CMSIS-Core.src ‑ dmb.c
CMSIS-Core.src ‑ dsb.c
…

This pull request removes 5 skipped tests and adds 5 skipped tests. Note that renamed tests count towards both.

CMSIS-Core.CMSIS-Core ‑ lda.c
CMSIS-Core.CMSIS-Core ‑ ldaex.c
CMSIS-Core.CMSIS-Core ‑ stl.c
CMSIS-Core.CMSIS-Core ‑ stlex.c
CMSIS-Core.CMSIS-Core ‑ systick.c

CMSIS-Core.src ‑ lda.c
CMSIS-Core.src ‑ ldaex.c
CMSIS-Core.src ‑ stl.c
CMSIS-Core.src ‑ stlex.c
CMSIS-Core.src ‑ systick.c

♻️ This comment has been updated with latest results.