image_builder: allow passing offset as numeric value

[lukileczo]

JIRA: RTOS-956

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

6 859 tests   - 882   6 229 ✅  - 797   37m 52s ⏱️ - 1m 52s
  405 suites  -  56     629 💤  -  86 
    1 files   ±  0       1 ❌ +  1 

For more details on these failures, see this check.

Results for commit f2e3e33. ± Comparison against base commit 6cab908.

This pull request removes 922 and adds 40 tests. Note that renamed tests count towards both.

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/ioctl/unit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/ioctl/unit.ioctl.invalid_req
…

phoenix-rtos-tests/libc/unix-socket ‑ armv7a7-imx6ull-evk:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_async
phoenix-rtos-tests/libc/unix-socket ‑ armv7a7-imx6ull-evk:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_errnos
phoenix-rtos-tests/libc/unix-socket ‑ armv7a7-imx6ull-evk:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_liveness
phoenix-rtos-tests/libc/unix-socket ‑ armv7a7-imx6ull-evk:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.recv_msg_peek
phoenix-rtos-tests/libc/unix-socket ‑ armv7a9-zynq7000-qemu:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_async
phoenix-rtos-tests/libc/unix-socket ‑ armv7a9-zynq7000-qemu:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_errnos
phoenix-rtos-tests/libc/unix-socket ‑ armv7a9-zynq7000-qemu:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_liveness
phoenix-rtos-tests/libc/unix-socket ‑ armv7a9-zynq7000-qemu:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.recv_msg_peek
phoenix-rtos-tests/libc/unix-socket ‑ armv7m4-stm32l4x6-nucleo:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_async
phoenix-rtos-tests/libc/unix-socket ‑ armv7m4-stm32l4x6-nucleo:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_errnos
…

This pull request removes 89 skipped tests and adds 3 skipped tests. Note that renamed tests count towards both.

phoenix-rtos-tests/libc/exit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/exit.unistd_Exit.unblock_thread_wait
phoenix-rtos-tests/libc/exit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/exit.unistd_Exit.unblock_thread_waitpid
phoenix-rtos-tests/libc/exit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/exit.unistd_exit.unblock_thread_wait
phoenix-rtos-tests/libc/exit ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/exit.unistd_exit.unblock_thread_waitpid
phoenix-rtos-tests/libc/misc ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/misc.ctype._tolower
phoenix-rtos-tests/libc/misc ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/misc.ctype._toupper
phoenix-rtos-tests/libc/misc ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/misc.ctype.toascii
phoenix-rtos-tests/libc/misc ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/misc.resolve_path.realpath_max_path
phoenix-rtos-tests/libc/misc ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/misc.stat_errno.enotdir
phoenix-rtos-tests/libc/misc ‑ armv7a9-zynq7000-zedboard:phoenix-rtos-tests/libc/misc.stat_mode.chr_type
…

phoenix-rtos-tests/libc/unix-socket ‑ armv7m4-stm32l4x6-nucleo:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_liveness
phoenix-rtos-tests/libc/unix-socket ‑ armv7m7-imxrt106x-evk:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_liveness
phoenix-rtos-tests/libc/unix-socket ‑ armv7m7-imxrt117x-evk:phoenix-rtos-tests/libc/unix-socket.test_unix_socket.accept_connect_liveness