test(grpc): mitigate GRPC test hangs with timeout rule

[halibobo1205]

What does this PR do?
Add a 30-second timeout rule as a workaround to prevent GRPC unit tests hanging at ThreadlessExecutor.waitAndDrain.
Why are these changes required?
Mitigate GRPC test hangs.
This PR has been tested by:

• Unit Tests
• Manual Testing

Follow up
grpc-java:ThreadlessExecutor.waitAndDrain related issue

Extra details

java.lang.Thread.State: WAITING (parking)
      at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
      - parking to wait for  <0x00000000c12000f8> (a io.grpc.stub.ClientCalls$ThreadlessExecutor)
      at java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
      at io.grpc.stub.ClientCalls$ThreadlessExecutor.waitAndDrain(ClientCalls.java:817)
      at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:166)
      at org.tron.api.WalletGrpc$WalletBlockingStub.accountPermissionUpdate(WalletGrpc.java:7983)
      at org.tron.core.services.RpcApiServicesTest.testAccountPermissionUpdate(RpcApiServicesTest.java:1102)


java.lang.Thread.State: WAITING (parking)
      at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
      - parking to wait for  <0x00000000c8f00108> (a io.grpc.stub.ClientCalls$ThreadlessExecutor)
      at java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
      at io.grpc.stub.ClientCalls$ThreadlessExecutor.waitAndDrain(ClientCalls.java:717)
      at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:159)
      at org.tron.api.WalletGrpc$WalletBlockingStub.createWitness2(WalletGrpc.java:7323)
      at org.tron.core.services.RpcApiServicesTest.testCreateWitness(RpcApiServicesTest.java:800)

java.lang.Thread.State: WAITING (parking)
      at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
      - parking to wait for  <0x00000000c50df010> (a io.grpc.stub.ClientCalls$ThreadlessExecutor)
      at java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
      at io.grpc.stub.ClientCalls$ThreadlessExecutor.waitAndDrain(ClientCalls.java:817)
      at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:166)
      at org.tron.api.DatabaseGrpc$DatabaseBlockingStub.getNowBlock(DatabaseGrpc.java:336)
      at org.tron.common.client.DatabaseGrpcClient.getBlock(DatabaseGrpcClient.java:40)
      at org.tron.program.SolidityNodeTest.testSolidityGrpcCall(SolidityNodeTest.java:67)

java.lang.Thread.State: WAITING (parking)
      at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
      - parking to wait for  <0x00000000c67000f8> (a io.grpc.stub.ClientCalls$ThreadlessExecutor)
      at java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
      at io.grpc.stub.ClientCalls$ThreadlessExecutor.waitAndDrain(ClientCalls.java:817)
      at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:166)
      at org.tron.api.WalletGrpc$WalletBlockingStub.getExpandedSpendingKey(WalletGrpc.java:8077)
      at org.tron.core.services.RpcApiServicesTest.test02GetExpandedSpendingKey(RpcApiServicesTest.java:1140)

java.lang.Thread.State: WAITING (parking)
      at jdk.internal.misc.Unsafe.park([email protected]/Native Method)
      - parking to wait for  <0x00000000e9c000a0> (a io.grpc.stub.ClientCalls$ThreadlessExecutor)
      at java.util.concurrent.locks.LockSupport.park([email protected]/LockSupport.java:211)
      at io.grpc.stub.ClientCalls$ThreadlessExecutor.waitAndDrain(ClientCalls.java:817)
      at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:166)
      at org.tron.api.WalletGrpc$WalletBlockingStub.estimateEnergy(WalletGrpc.java:7822)
      at org.tron.core.services.RpcApiServicesTest.testEstimateEnergy(RpcApiServicesTest.java:1026)