Skip Aerospike test on 32-bits, warn users it's unsupported.

changelog/20825.txt

@@ -0,0 +1,3 @@
+```release-note:change
+storage/aerospike: Aerospike storage shouldn't be used on 32-bit architectures and is now unsupported on them.
+```

physical/aerospike/aerospike_test.go

@@ -5,6 +5,7 @@ package aerospike
 
 import (
 	"context"
+	"math/bits"
 	"testing"
 	"time"
 
@@ -16,6 +17,9 @@ import (
 )
 
 func TestAerospikeBackend(t *testing.T) {
+	if bits.UintSize == 32 {
+		t.Skip("Aerospike storage is only supported on 64-bit architectures")
+	}
 	cleanup, config := prepareAerospikeContainer(t)
 	defer cleanup()
 

website/content/docs/configuration/storage/aerospike.mdx

@@ -19,6 +19,9 @@ The Aerospike storage backend is used to persist Vault's data in an
   be as knowledgeable about the technology. If you encounter problems with them,
   you may be referred to the original author.
 
+- **64-bit only** - the Aerospike storage backend is not supported when Vault runs
+  on a 32-bit architecture, because the Aerospike Go client doesn't support 32-bits.
+
 ```hcl
 storage "aerospike" {
   hostname = "localhost"