build.sh: Add support for building/bundling super images

Description

build.sh: Add support for building/bundling super images

Issue(s)

https://gitlab.e.foundation/e/backlog/-/issues/3628

Test environment

1. Set build CI to 3628-r-super_image
2. Make a build for FP4 (which will build and bundle the superimage) and FP3 (which will NOT build and bundle superimage):

• DEVICES: FP4 FP3
• BRANCH_NAME: v1-r
• FEATURE_BRANCH: 4419-r-init_FP4

Pipeline: https://gitlab.e.foundation/e/priv/os/build/-/pipelines/152354

Test procedures

• Verify FP3 build to completion
• Verify FP4 build to completion
• Observe that IMG-e-0.20-r-*-test-FP3.zip has all the images as usual
• Observe that IMG-e-0.20-r-*-test-FP4.zip has all the images as usual, inaddition super.img but skips odm.img product.img system.img system_ext.img vendor.img

Check list

• Self review
• Test procedure explained
• Tested on fresh install
• Tested applied as an update
• License
• Internal documentation
• User documentation