ci: Fix trigger and results rules
requested to merge Ali.Oezaslan/meta-cassini-bsp:topics/CAS-84/AMPLATFORMS-3087-fix-target-branch-rules into nanbield
When MR is created for main branch on meta-cassini-bsp trigger master branch on meta-cassini, nanbield branch on meta-cassini-bsp trigger nanbield-dev branch on meta-cassini, mickledore branch on meta-cassini-bsp trigger mickledore-dev branch on meta-cassini, kirkstone branch on meta-cassini-bsp trigger kirkstone-dev branch on meta-cassini.
Download-Results job will be created, only if trigger-meta-cassini job is created.
Build image and platform rules are adjusted and default values are changed.