chore: update README and system test for node20 (#919)

* chore: update README and system test for node20

* 🦉 Updates from OwlBot post-processor

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

---------

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

Author: aabmass

handwritten/devtools-cloudprofiler/.readme-partials.yaml

@@ -2,19 +2,14 @@ body: |-
 
     ### Prerequisites
 
-    1. Your application will need to be using Node.js 10.4.1 or greater or Node.js
-    12. The profiler will not be enabled when using earlier versions of 10 because
-    versions of Node.js 10 prior to 10.4.1 are impacted by
-    [this](https://bugs.chromium.org/p/chromium/issues/detail?id=847863) issue,
-    which can cause garbage collection to take several minutes when heap profiling
-    is enabled.
+    1. Your application will need to be using Node.js version between 14 and 20.
 
     1. `@google-cloud/profiler` depends on the
     [`pprof`](https://www.npmjs.com/package/pprof) module, a module with a native
     component that is used to collect profiles with v8's CPU and Heap profilers.
     You may need to install additional dependencies to build the `pprof` module.
         * For Linux: `pprof` has prebuilt binaries available for Linux and Alpine
-        Linux for Node 10 and 12. No additional dependencies are required.
+        Linux for Node 14 and 16. No additional dependencies are required.
         * For other environments: when using `@google-cloud/profiler` on environments
         that `pprof` does not have prebuilt binaries for, the module
         [`node-gyp`](https://www.npmjs.com/package/node-gyp) will be used to
@@ -142,10 +137,10 @@ body: |-
 
     ```json
     "engines": {
-        "node": ">=10.4.1"
+        "node": ">=14.0.0"
     }
     ```
-    The above snippet will ensure that you're using 10.4.1 or greater.
+    The above snippet will ensure that you're using 14.0.0 or greater.
 
     Deploy your application to App Engine Flexible environment as usual.
 
@@ -277,4 +272,4 @@ body: |-
             private_key: 'private_key'
             }
         });
-        ```
+        ```

handwritten/devtools-cloudprofiler/README.md

@@ -55,19 +55,14 @@ npm install @google-cloud/profiler
 
 ### Prerequisites
 
-1. Your application will need to be using Node.js 10.4.1 or greater or Node.js
-12. The profiler will not be enabled when using earlier versions of 10 because
-versions of Node.js 10 prior to 10.4.1 are impacted by
-[this](https://bugs.chromium.org/p/chromium/issues/detail?id=847863) issue,
-which can cause garbage collection to take several minutes when heap profiling
-is enabled.
+1. Your application will need to be using Node.js version between 14 and 20.
 
 1. `@google-cloud/profiler` depends on the
 [`pprof`](https://www.npmjs.com/package/pprof) module, a module with a native
 component that is used to collect profiles with v8's CPU and Heap profilers.
 You may need to install additional dependencies to build the `pprof` module.
     * For Linux: `pprof` has prebuilt binaries available for Linux and Alpine
-    Linux for Node 10 and 12. No additional dependencies are required.
+    Linux for Node 14 and 16. No additional dependencies are required.
     * For other environments: when using `@google-cloud/profiler` on environments
     that `pprof` does not have prebuilt binaries for, the module
     [`node-gyp`](https://www.npmjs.com/package/node-gyp) will be used to
@@ -195,10 +190,10 @@ the following to your `package.json`:
 
 ```json
 "engines": {
-    "node": ">=10.4.1"
+    "node": ">=14.0.0"
 }
 ```
-The above snippet will ensure that you're using 10.4.1 or greater.
+The above snippet will ensure that you're using 14.0.0 or greater.
 
 Deploy your application to App Engine Flexible environment as usual.
 

handwritten/devtools-cloudprofiler/system-test/integration_test.go

@@ -300,6 +300,19 @@ func TestAgentIntegration(t *testing.T) {
 			timeout:       gceTestTimeout,
 			benchDuration: gceBenchDuration,
 		},
+		{
+			InstanceConfig: proftest.InstanceConfig{
+				ProjectID:   projectID,
+				Zone:        zone,
+				Name:        fmt.Sprintf("profiler-test-node20-%s", runID),
+				MachineType: "n1-standard-1",
+			},
+			name:          fmt.Sprintf("profiler-test-node20-%s-gce", runID),
+			wantProfiles:  wantProfiles,
+			nodeVersion:   "20",
+			timeout:       gceTestTimeout,
+			benchDuration: gceBenchDuration,
+		},
 	}
 
 	if *runBackoffTest {