Use stellar-core upgrade config set command #511

Job	Run time
amd64 / build-stellar-soroban-rpc	1m 32s
amd64 / build-stellar-core	24s
amd64 / build-stellar-horizon	2m 43s
amd64 / build-stellar-friendbot	1m 8s
arm64 / build-stellar-core	27s
arm64 / build-stellar-friendbot	2m 44s
arm64 / build-stellar-horizon	15m 1s
arm64 / build-stellar-soroban-rpc	1m 13s
amd64 / build	3m 3s
amd64 / test (pubnet)	2m 3s
amd64 / test (local)	2m 0s
amd64 / push-pr	1m 6s
amd64 / push-release	0s
arm64 / build	8m 23s
arm64 / test (pubnet)	1m 31s
arm64 / test (local)	2m 36s
arm64 / push-pr	1m 7s
arm64 / push-release	0s
manifest / push	11s
complete	1s
	47m 13s

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