fix: proactively check for shutdown event (#1396)

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## Overview

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The log lines in the execute method were panicing due to un-caught
shutdown events.
This nicely handles that.

This was verified locally. Previously the test would panic when run in a
loop < 10 times.
Now you can run it 100x 👍 


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Bug Fixes**
- Implemented a check to prevent block execution during node shutdown,
enhancing system stability.
- Updated the execution process to utilize the provided context for
better operation tracking and cancellation support.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: MSevey

state/executor.go

@@ -327,6 +327,12 @@ func (e *BlockExecutor) Validate(state types.State, block *types.Block) error {
 }
 
 func (e *BlockExecutor) execute(ctx context.Context, state types.State, block *types.Block) (*abci.ResponseFinalizeBlock, error) {
+	// Only execute if the node hasn't already shut down
+	select {
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	default:
+	}
 	abciHeader, err := abciconv.ToABCIHeaderPB(&block.SignedHeader.Header)
 	if err != nil {
 		return nil, err
@@ -337,7 +343,7 @@ func (e *BlockExecutor) execute(ctx context.Context, state types.State, block *t
 		return nil, err
 	}
 
-	finalizeBlockResponse, err := e.proxyApp.FinalizeBlock(context.TODO(), &abci.RequestFinalizeBlock{
+	finalizeBlockResponse, err := e.proxyApp.FinalizeBlock(ctx, &abci.RequestFinalizeBlock{
 		Hash:               block.Hash(),
 		NextValidatorsHash: nil,
 		ProposerAddress:    abciHeader.ProposerAddress,