chore: deploy relayer to testnet4 and mainnet3 (#4498)

### Description

- Updates the relayer deployments on mainnet3 (hyperlane & neutron
contexts) & testnet4 (hyperlane)
- Includes a couple recent relayer impacting PRs: #4489 and #4495 

### Drive-by changes

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Are there any minor or drive-by changes also included?
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### Related issues

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- Fixes #[issue number here]
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### Backward compatibility

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implications, e.g. changes that would prohibit deploying older commits
using this infra tooling?

Yes/No
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### Testing

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What kind of testing have these changes undergone?

None/Manual/Unit Tests
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typescript/infra/config/environments/mainnet3/agent.ts

@@ -378,7 +378,7 @@ const hyperlane: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: '9c056c7-20240911-154357',
+      tag: '5a0d68b-20240916-144115',
     },
     gasPaymentEnforcement: gasPaymentEnforcement,
     metricAppContexts,
@@ -412,7 +412,7 @@ const releaseCandidate: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: '9c056c7-20240911-154357',
+      tag: '5a0d68b-20240916-144115',
     },
     // We're temporarily (ab)using the RC relayer as a way to increase
     // message throughput.
@@ -445,7 +445,7 @@ const neutron: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: '74a592e-20240906-191210',
+      tag: '5a0d68b-20240916-144115',
     },
     gasPaymentEnforcement: [
       {

typescript/infra/config/environments/testnet4/agent.ts

@@ -177,7 +177,7 @@ const hyperlane: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: '73c232b-20240912-124300',
+      tag: '5a0d68b-20240916-144115',
     },
     blacklist: [...releaseCandidateHelloworldMatchingList, ...relayBlacklist],
     gasPaymentEnforcement,
@@ -223,7 +223,7 @@ const releaseCandidate: RootAgentConfig = {
     rpcConsensusType: RpcConsensusType.Fallback,
     docker: {
       repo,
-      tag: '73c232b-20240912-124300',
+      tag: '5a0d68b-20240916-144115',
     },
     whitelist: [...releaseCandidateHelloworldMatchingList],
     blacklist: relayBlacklist,