change some test names for clarity

Author: sebsto

Tests/AWSLambdaRuntimeTests/LambdaRuntimeClientTests.swift

@@ -89,7 +89,7 @@ struct LambdaRuntimeClientTests {
     }
 
     @Test
-    func testCancellation() async throws {
+    func testRuntimeClientCancellation() async throws {
         struct HappyBehavior: LambdaServerBehavior {
             let requestId = UUID().uuidString
             let event = "hello"

Tests/AWSLambdaRuntimeTests/PoolTests.swift

@@ -37,7 +37,7 @@ struct PoolTests {
     }
 
     @Test
-    func testCancellation() async throws {
+    func testPoolCancellation() async throws {
         let pool = LambdaHTTPServer.Pool<String>()
 
         // Create a task that will be cancelled