execution: make block read aheader non-global (#21056) #381

Job	Run time
race-tests / load-matrix	9s
repro / reproducible-build (windows-2025)	16m 1s
caplin / tests (ubuntu-24.04)	6m 58s
caplin / tests-windows (windows-2025)	10m 14s
repro / reproducible-build (ubuntu-24.04)	4m 21s
tests / tests-mac-linux (ubuntu-24.04)	25m 2s
tests / tests-mac-linux (macos-15)	19m 15s
sonar / sonar	12m 28s
kurtosis / assertoor_glamsterdam_test	6m 17s
repro / reproducible-build (macos-15)	8m 47s
kurtosis / assertoor_pectra_test	7m 27s
kurtosis / assertoor_caplin-minimal_test	6m 36s
tests / tests-mac-linux (windows-2025)	32m 32s
bench / benchmarks	10m 48s
kurtosis / assertoor_regular_test	5m 49s
race-tests / tests-linux (ubuntu-latest, execution-tests)	36m 22s
race-tests / tests-linux (ubuntu-latest, execution-eest-devnet)	16m 52s
race-tests / tests-linux (ubuntu-latest, core-rpc)	10m 31s
race-tests / tests-linux (ubuntu-latest, execution-eest-blockchain)	17m 24s
race-tests / tests-linux (ubuntu-latest, consensus)	16m 58s
race-tests / tests-linux (ubuntu-latest, execution-other)	12m 28s
race-tests / tests-linux (ubuntu-latest, other)	8m 37s
	4h 51m 56s

Provide feedback