posix: xsi_realtime: portability.posix.xsi_realtime* report RAM overflow

[katgiadla]

Describe the bug
Tests

• tests/posix/xsi_realtime/portability.posix.xsi_realtime
• tests/posix/xsi_realtime/portability.posix.xsi_realtime.minimal
• tests/posix/xsi_realtime/portability.posix.xsi_realtime.newlib
• tests/posix/xsi_realtime/portability.posix.xsi_realtime.picolibc

report RAM overflow.

Observed for qemu_cortex_m3/ti_lm3s6965

To Reproduce
Steps to reproduce the behavior:

1. go to your zephyr dir
2. call $ZEPHYR_BASE/scripts/twister -T tests/posix/xsi_realtime -p qemu_cortex_m3/ti_lm3s6965 -v --inline-logs --overflow-as-errors
3. See console output with error

Expected behavior
Valid console output

Impact
Not clear

Logs and console output

opt/zephyr-sdk/arm-zephyr-eabi/bin/lib/gcc/arm-zephyr-eabi/12.2.0/arm-zephyr-eabi/bin/ld.bfd: zephyr/zephyr_pre0.elf section `bss' will not fit in region `RAM'
opt/zephyr-sdk/arm-zephyr-eabi/bin/lib/gcc/arm-zephyr-eabi/12.2.0/arm-zephyr-eabi/bin/ld.bfd: region `RAM' overflowed by 39304 bytes
collect2: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.

Environment (please complete the following information):

• OS: Ubuntu 20.04.1 LTS
• Toolchain Zephyr SDK 0.17.0
• Commit SHA or Version used: v4.1.0-3474-gee940cb6dcba

[cfriedt]

@katgiadla - is this failing in Zephyr's CI? If so, can you please include a link to the failing run?