capsule-tool: Add full multi-payload capsule support, cleanup legacy code, and extend debug/dump capabilities
This MR adds full multi-payload support to capsule-tool.py, removes legacy single-payload code, and extends debug/dump functionality. It also updates check-sr-results.py to parse the new multi-payload output.
Signed-off-by: Sathisha S sathisha.shivaramappa@arm.com