Fix the serviceAccount print column (#111)

Issue #, if available: N/A

Description of changes: Fixes the printcolumn on podidentityassociations.  The ServiceAccount field is set to:
```
ServiceAccount *string `json:"serviceAccount"`
```

But the printcolumn was set to:

```
// +kubebuilder:printcolumn:name="SERVICEACCOUNT",type=string,priority=0,JSONPath=`.spec.serviceaccount`
```

It is case sensitive so it was not matching.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

Author: creiche

apis/v1alpha1/ack-generate-metadata.yaml

@@ -1,13 +1,13 @@
 ack_generate_info:
-  build_date: "2024-03-06T21:37:28Z"
-  build_hash: a5ba3c851434263128a1464a2c41e528779eeefa
+  build_date: "2024-03-14T22:05:00Z"
+  build_hash: ca5ff205b7be9c7fac8f35f8e7a3f6eae22af3ed
   go_version: go1.22.0
-  version: v0.32.1
-api_directory_checksum: d960a9f06b58cc445e5ab21fb26ee6d92c441374
+  version: v0.32.1-2-gca5ff20
+api_directory_checksum: 9026ab1865c6ec4c29670dd2f0805151f437fc92
 api_version: v1alpha1
 aws_sdk_go_version: v1.49.13
 generator_config_info:
-  file_checksum: d4bad3acfd8ddb3923869d78c65384973ff25151
+  file_checksum: 9b6fc7e4c1d20a7c22de2a47af371279c26ee490
   original_file_name: generator.yaml
 last_modification:
   reason: API generation

apis/v1alpha1/generator.yaml

@@ -372,7 +372,7 @@ resources:
         type: string
         index: 20
       - name: SERVICEACCOUNT
-        json_path: .spec.serviceaccount
+        json_path: .spec.serviceAccount
         type: string
         index: 30
       - name: ROLEARN

apis/v1alpha1/pod_identity_association.go

@@ -21,7 +21,7 @@ spec:
     - jsonPath: .spec.namespace
       name: NAMESPACE
       type: string
-    - jsonPath: .spec.serviceaccount
+    - jsonPath: .spec.serviceAccount
       name: SERVICEACCOUNT
       type: string
     - jsonPath: .spec.roleARN

config/crd/bases/eks.services.k8s.aws_podidentityassociations.yaml

@@ -372,7 +372,7 @@ resources:
         type: string
         index: 20
       - name: SERVICEACCOUNT
-        json_path: .spec.serviceaccount
+        json_path: .spec.serviceAccount
         type: string
         index: 30
       - name: ROLEARN

generator.yaml

@@ -21,7 +21,7 @@ spec:
     - jsonPath: .spec.namespace
       name: NAMESPACE
       type: string
-    - jsonPath: .spec.serviceaccount
+    - jsonPath: .spec.serviceAccount
       name: SERVICEACCOUNT
       type: string
     - jsonPath: .spec.roleARN