Revert "release deliver: Check existing tag"

This reverts commit 8af66daa69ec38430d9c09cc7bee4d3e6658eeaf.

Signed-off-by: Ondrej Kupka <ondra.cap@gmail.com>
release deliver: Change order of merging

Merge release into develop, then into master. This prevents master from
being tagged and then failing during merging with develop. Tagging is
now the very last operation, so you definitely do it only once.

Signed-off-by: Ondrej Kupka <ondra.cap@gmail.com>
Finished feature 54431574/release-finish-aborts-on-conflict.