Better testing support for engine api

[mattsse]

with #9742 we added some additional testing setup

bet we want this to be easier and ideally a few more helper types for that so we can replay testnet blocks for example

Tasks

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1. test: add engine tree test, FCU triggers reorg with all the blocks present #9943
   C-enhancement C-test +2
2. test: add engine tree test, FCU with missing head #9890
   C-test +1
3. Live sync transition scenario tests #10015
   C-bug C-test +2
   
4. Better test coverage for range db queries #11451
   C-test +1
   
5. Add testing with persistence mocks #11676
   C-test +1