Remove unnecessary exception logs in AbstractContextAwareFuture (#5328

)

Motivation:

When a decorator using `ctx.makeContextAware()` throws an exception in `handle()`, `AbstractContextAwareFuture` will log a misleading `An error occurred while pushing a context`. Instead, we shouldn't log anything.

This was an accidental side effect of a726fd3#diff-4ad33a0c0d9becf6780837efb73386e5547723d537f79a22e313118e78a67d38

Modifications:

- Remove warn logs for upstream exceptions in `AbstractContextAwareFuture`, and only log `context.push()` exceptions

Result:

- We no longer see misleading logs when throwing exceptions in `ContextAwareFuture.handle()` and other methods

core/src/main/java/com/linecorp/armeria/internal/common/AbstractContextAwareFuture.java

@@ -85,22 +85,38 @@ protected final <I, U, V> BiFunction<I, U, V> makeContextAwareLoggingException(B
         return (t, u) -> makeContextAwareLoggingException0(() -> fn.apply(t, u));
     }
 
+    @SuppressWarnings("MustBeClosedChecker")
     private void makeContextAwareLoggingException0(Runnable action) {
-        try (SafeCloseable ignored = context.push()) {
-            action.run();
+        final SafeCloseable handle;
+        try {
+            handle = context.push();
         } catch (Throwable th) {
             logger.warn("An error occurred while pushing a context", th);
             throw th;
         }
+
+        try {
+            action.run();
+        } finally {
+            handle.close();
+        }
     }
 
+    @SuppressWarnings("MustBeClosedChecker")
     private <V> V makeContextAwareLoggingException0(Supplier<? extends V> fn) {
-        try (SafeCloseable ignored = context.push()) {
-            return fn.get();
+        final SafeCloseable handle;
+        try {
+            handle = context.push();
         } catch (Throwable th) {
             logger.warn("An error occurred while pushing a context", th);
             throw th;
         }
+
+        try {
+            return fn.get();
+        } finally {
+            handle.close();
+        }
     }
 
     @Override