Fix flaky test in NIOAsyncWriter (#2431)

* Fix flaky test in NIOAsyncWriter

# Motivation
We had flaky test in the writer where we were relying on some timing.

# Modification
Change the test so that it is deterministic.

# Result
Fixes https://github.com/apple/swift-nio/issues/2427

* Update allocation counters

Tests/NIOCoreTests/AsyncSequences/NIOAsyncWriterTests.swift

@@ -130,31 +130,19 @@ final class NIOAsyncWriterTests: XCTestCase {
     }
 
     func testWriterDeinitialized_whenStreaming() async throws {
-        Task { [writer] in
-            try await writer!.yield("message1")
-        }
-
-        try await Task.sleep(nanoseconds: 1_000_000)
-
+        try await writer.yield("message1")
         self.writer = nil
 
         XCTAssertEqual(self.delegate.didTerminateCallCount, 1)
     }
 
     func testWriterDeinitialized_whenWriterFinished() async throws {
-        self.sink.setWritability(to: false)
-
-        Task { [writer] in
-            try await writer!.yield("message1")
-        }
-
-        try await Task.sleep(nanoseconds: 1_000_000)
-
+        try await writer.yield("message1")
         self.writer.finish()
         self.writer = nil
 
-        XCTAssertEqual(self.delegate.didYieldCallCount, 0)
-        XCTAssertEqual(self.delegate.didTerminateCallCount, 0)
+        XCTAssertEqual(self.delegate.didYieldCallCount, 1)
+        XCTAssertEqual(self.delegate.didTerminateCallCount, 1)
     }
 
     func testWriterDeinitialized_whenFinished() async throws {

docker/docker-compose.2204.main.yaml

@@ -34,13 +34,13 @@ services:
       - MAX_ALLOCS_ALLOWED_1000_getHandlers=8050
       - MAX_ALLOCS_ALLOWED_1000_getHandlers_sync=36
       - MAX_ALLOCS_ALLOWED_1000_reqs_1_conn=26400
-      - MAX_ALLOCS_ALLOWED_1000_rst_connections=147000
+      - MAX_ALLOCS_ALLOWED_1000_rst_connections=148000
       - MAX_ALLOCS_ALLOWED_1000_tcpbootstraps=4050
-      - MAX_ALLOCS_ALLOWED_1000_tcpconnections=154050
+      - MAX_ALLOCS_ALLOWED_1000_tcpconnections=155050
       - MAX_ALLOCS_ALLOWED_1000_udp_reqs=6050
       - MAX_ALLOCS_ALLOWED_1000_udpbootstraps=2050
       - MAX_ALLOCS_ALLOWED_1000_udpconnections=77050
-      - MAX_ALLOCS_ALLOWED_1_reqs_1000_conn=399000
+      - MAX_ALLOCS_ALLOWED_1_reqs_1000_conn=401000
       - MAX_ALLOCS_ALLOWED_bytebuffer_lots_of_rw=2050
       - MAX_ALLOCS_ALLOWED_creating_10000_headers=0
       - MAX_ALLOCS_ALLOWED_decode_1000_ws_frames=2050
@@ -61,7 +61,7 @@ services:
       - MAX_ALLOCS_ALLOWED_get_100000_headers_canonical_form_trimming_whitespace_from_short_string=700050
       - MAX_ALLOCS_ALLOWED_modifying_1000_circular_buffer_elements=0
       - MAX_ALLOCS_ALLOWED_modifying_byte_buffer_view=6050
-      - MAX_ALLOCS_ALLOWED_ping_pong_1000_reqs_1_conn=341
+      - MAX_ALLOCS_ALLOWED_ping_pong_1000_reqs_1_conn=343
       - MAX_ALLOCS_ALLOWED_read_10000_chunks_from_file=140050
       - MAX_ALLOCS_ALLOWED_schedule_10000_tasks=50100
       - MAX_ALLOCS_ALLOWED_schedule_and_run_10000_tasks=50050