Set TESTING_SOROBAN_HIGH_LIMIT_OVERRIDE for standalone network #390

Job	Run time
arm64 / build-stellar-core	24s
arm64 / build-stellar-friendbot	2m 50s
arm64 / build-stellar-horizon	10m 40s
arm64 / build-stellar-soroban-rpc	50s
amd64 / build-stellar-core	34s
amd64 / build-stellar-friendbot	54s
amd64 / build-stellar-horizon	3m 51s
amd64 / build-stellar-soroban-rpc	1m 35s
amd64 / build	3m 57s
amd64 / test (testnet)	2m 45s
amd64 / push-pr	0s
amd64 / test (pubnet)	1m 43s
amd64 / test (local)	1m 52s
amd64 / test (local, --enable-horizon-captive-core)	1m 40s
arm64 / build	6m 48s
amd64 / push-release	0s
arm64 / test (testnet)	14m 8s
arm64 / test (pubnet)	1m 33s
arm64 / push-pr	0s
arm64 / test (local)	2m 3s
arm64 / test (local, --enable-horizon-captive-core)	2m 39s
arm64 / push-release	0s
manifest / push	0s
complete	1s
	1h 0m 47s

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