genesis: create EpochRewards at epoch 0 #23040

Job	Run time
cargo-test-sbf (associated-token-account)	9m 32s
check (associated-token-account)	1m 26s
cargo-test-sbf (feature-proposal)	6m 12s
test_cli (single-pool)	14m 15s
check (feature-proposal)	2m 38s
cargo-test-sbf (instruction-padding)	7m 38s
test_cli (token-2022)	12m 52s
check (instruction-padding)	1m 19s
cargo-test-sbf (memo)	6m 30s
check (memo)	1m 13s
cargo-test-sbf (record)	6m 44s
check (record)	1m 50s
cargo-test-sbf (single-pool)	8m 11s
check (single-pool)	3m 15s
cargo-test-sbf (slashing)	10m 32s
check (slashing)	6m 7s
check (stake-pool)	2m 51s
cargo-test-sbf (stake-pool)	15m 18s
check (token-2022)	3m 50s
cargo-test-sbf (token-2022)	9m 1s
	2h 11m 14s

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