linux builds of -dev images fail

Value

Both oniro-image-base-dev and oniro-image-extra-dev images fail to build for seco-intel-b68 because of the following error:

ERROR: oniro-image-base-dev-1.0-r0 do_image_wic: ExecutionError('/build/oniro/v1.0.0-rc-317-g1c6af91/build-linux-seco-intel-b68/tmp/work/seco_intel_b68-oniro-linux-musl/oniro-image-base-dev/1.0-r0/temp/run.do_image_wic.2365094', 1, None, None)
ERROR: Logfile of failure stored in: /build/oniro/v1.0.0-rc-317-g1c6af91/build-linux-seco-intel-b68/tmp/work/seco_intel_b68-oniro-linux-musl/oniro-image-base-dev/1.0-r0/temp/log.do_image_wic.2365094
Log data follows:
[...]
| DEBUG: Executing shell function do_image_wic
| INFO: Creating image(s)...
|
| ERROR: File system image of partition / is larger (2132232 kB) than its allowed size 2097152 kB

The same error happens on qemux86-64, qemux86, raspberrypi4-64, seco-imx8mm-c61-2gb and seco-imx8mm-c61-4gb but only with oniro-image-base-dev image (no errors with oniro-image-extra-dev instead):

| ERROR: File system image of partition / is larger (1560796 kB) than its allowed size 1048576 kB

| ERROR: File system image of partition / is larger (1449232 kB) than its allowed size 1048576 kB

| ERROR: File system image of partition / is larger (1237584 kB) than its allowed size 1048576 kB

| ERROR: File system image of partition / is larger (1633404 kB) than its allowed size 1048576 kB

| ERROR: File system image of partition / is larger (1633408 kB) than its allowed size 1048576 kB

Acceptance Criteria

-dev images should build for all machines