Fix IR conversion when an Event selector is accessed #5761

Job	Run time
tests (ubuntu-latest, 3.8, data_dependency)	25s
tests (ubuntu-latest, 3.8, path_filtering)	25s
tests (ubuntu-latest, 3.8, erc)	48s
tests (ubuntu-latest, 3.8, find_paths)	2m 3s
tests (ubuntu-latest, 3.8, flat)	25s
tests (ubuntu-latest, 3.8, interface)	25s
tests (ubuntu-latest, 3.8, printers)	1m 8s
tests (ubuntu-latest, 3.8, slither_config)	26s
tests (ubuntu-latest, 3.8, upgradability)	46s
tests (ubuntu-latest, 3.12, data_dependency)	2m 8s
tests (ubuntu-latest, 3.12, path_filtering)	30s
tests (ubuntu-latest, 3.12, erc)	33s
tests (ubuntu-latest, 3.12, find_paths)	34s
tests (ubuntu-latest, 3.12, flat)	25s
tests (ubuntu-latest, 3.12, interface)	36s
tests (ubuntu-latest, 3.12, printers)	1m 8s
tests (ubuntu-latest, 3.12, slither_config)	29s
tests (ubuntu-latest, 3.12, upgradability)	47s
	14m 1s

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