test: update beacon api spec to v2.5.0 #18187

Job	Run time
Build	2m 28s
Build	2m 28s
Eth backup provider sim tests	6m 54s
Eth backup provider sim tests	6m 54s
Endpoint sim tests	2m 52s
Endpoint sim tests	2m 52s
Mixed clients sim tests	8m 5s
Mixed clients sim tests	8m 5s
Multifork sim test	11m 10s
Multifork sim test	10m 9s
Deneb sim tests	6m 14s
Deneb sim tests	6m 14s
	1h 14m 25s

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