rimage: Add support for resigning ace manifest

[softwarecki]

Add support for ace 1.5 manifest to resign_image function. Subtract the number of skipped bytes from the file size to avoid going
beyond of memory buffer. Copy data preceding the cse header to the output file to preserve extended manifest.

[Copilot]

Pull Request Overview

Adds support for the new ACE 1.5 manifest format in resign_image.

• Adjusts image_end to subtract skipped bytes from total size
• Extends manifest version checks and invokes ri_manifest_sign_ace_v1_5
• Copies the extended manifest region before the CSE header into the output file

Comments suppressed due to low confidence (3)

tools/rimage/src/manifest.c:1733

• [nitpick] The variable 'i' is ambiguous; consider renaming it to something like 'header_offset' or 'skip_bytes' to clarify its purpose.

image->image_end = size - i;

tools/rimage/src/manifest.c:1783

• The return value of 'man_write_fw_mod' is ignored; capture and check its result so you can abort on write failures instead of proceeding silently.

man_write_fw_mod(image);

tools/rimage/src/manifest.c:1758

• You've added handling for ACE v1.5, but there aren’t any tests covering this new branch; please add unit tests for the ACE manifest path.

else if (image->adsp->man_ace_v1_5)