Set TESTING_SOROBAN_HIGH_LIMIT_OVERRIDE for standalone network #386

Job	Run time
arm64 / build-stellar-horizon	11m 23s
arm64 / build-stellar-friendbot	9m 37s
arm64 / build-stellar-core	21s
arm64 / build-stellar-soroban-rpc	1m 54s
amd64 / build-stellar-friendbot	1m 18s
amd64 / build-stellar-horizon	2m 58s
amd64 / build-stellar-core	33s
amd64 / build-stellar-soroban-rpc	3m 28s
amd64 / build	5m 52s
amd64 / test (standalone)	4m 0s
amd64 / test (standalone, --enable-horizon-captive-core)	3m 55s
amd64 / test (standalone, --enable-soroban-rpc)	3m 55s
amd64 / push-pr	0s
arm64 / build	7m 53s
amd64 / push-release	0s
arm64 / test (standalone)	4m 1s
arm64 / test (standalone, --enable-horizon-captive-core)	4m 6s
arm64 / test (standalone, --enable-soroban-rpc)	3m 53s
arm64 / push-pr	0s
arm64 / push-release	0s
manifest	0s
complete	1s
	1h 9m 8s

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