fix: Supress unchecked conversion warnings (#1014)

* fix: Supress unchecked conversion warnings

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Ben Creech <bpcreech@google.com>
Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: 3 people

google-cloud-logging/src/main/java/com/google/cloud/logging/Payload.java

@@ -68,6 +68,7 @@ public static StringPayload of(String data) {
       return new StringPayload(data);
     }
 
+    @SuppressWarnings("unchecked")
     static StringPayload fromPb(com.google.logging.v2.LogEntry entryPb) {
       return StringPayload.of(entryPb.getTextPayload());
     }
@@ -124,6 +125,7 @@ public static JsonPayload of(Struct data) {
       return new JsonPayload(data);
     }
 
+    @SuppressWarnings("unchecked")
     static JsonPayload fromPb(com.google.logging.v2.LogEntry entryPb) {
       return JsonPayload.of(entryPb.getJsonPayload());
     }
@@ -148,6 +150,7 @@ public static ProtoPayload of(Any data) {
       return new ProtoPayload(data);
     }
 
+    @SuppressWarnings("unchecked")
     static ProtoPayload fromPb(com.google.logging.v2.LogEntry entryPb) {
       return ProtoPayload.of(entryPb.getProtoPayload());
     }

google-cloud-logging/src/main/java/com/google/cloud/logging/SinkInfo.java

@@ -129,6 +129,7 @@ public static BucketDestination of(String bucket) {
         return new BucketDestination(bucket);
       }
 
+      @SuppressWarnings("unchecked")
       static BucketDestination fromPb(String destinationPb) {
         Matcher matcher = PATTERN.matcher(destinationPb);
         if (!matcher.matches()) {
@@ -221,6 +222,7 @@ static boolean matchesDestination(String destinationPb) {
         return PATTERN.matcher(destinationPb).matches();
       }
 
+      @SuppressWarnings("unchecked")
       static DatasetDestination fromPb(String destinationPb) {
         Matcher matcher = PATTERN.matcher(destinationPb);
         if (!matcher.matches()) {
@@ -321,6 +323,7 @@ static boolean matchesDestination(String destinationPb) {
         return PATTERN.matcher(destinationPb).matches();
       }
 
+      @SuppressWarnings("unchecked")
       static LoggingBucketDestination fromPb(String destinationPb) {
         Matcher matcher = PATTERN.matcher(destinationPb);
         if (!matcher.matches()) {
@@ -413,6 +416,7 @@ static boolean matchesDestination(String destinationPb) {
         return PATTERN.matcher(destinationPb).matches();
       }
 
+      @SuppressWarnings("unchecked")
       static TopicDestination fromPb(String destinationPb) {
         Matcher matcher = PATTERN.matcher(destinationPb);
         if (!matcher.matches()) {