doc,benchmark: move benchmark guide to benchmark directory

The doc/guides directory looks like a place for guides to using Node.js
but it's actually where we store development/internal documentation.
Move the benchmark guide to the benchmark directory where someone (who
doesn't know that bit of somewhat-surprising information) is more likely
to find it.

PR-URL: https://github.com/nodejs/node/pull/30781
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

benchmark/README.md

@@ -5,7 +5,7 @@ of different Node.js implementations and different ways of
 writing JavaScript run by the built-in JavaScript engine.
 
 For a detailed guide on how to write and run benchmarks in this
-directory, see [the guide on benchmarks](../doc/guides/writing-and-running-benchmarks.md).
+directory, see [the guide on benchmarks](writing-and-running-benchmarks.md).
 
 ## Table of Contents
 
@@ -76,17 +76,17 @@ writing benchmarks.
 
 ### createBenchmark(fn, configs\[, options\])
 
-See [the guide on writing benchmarks](../doc/guides/writing-and-running-benchmarks.md#basics-of-a-benchmark).
+See [the guide on writing benchmarks](writing-and-running-benchmarks.md#basics-of-a-benchmark).
 
 ### default\_http\_benchmarker
 
 The default benchmarker used to run HTTP benchmarks.
-See [the guide on writing HTTP benchmarks](../doc/guides/writing-and-running-benchmarks.md#creating-an-http-benchmark).
+See [the guide on writing HTTP benchmarks](writing-and-running-benchmarks.md#creating-an-http-benchmark).
 
 ### PORT
 
 The default port used to run HTTP benchmarks.
-See [the guide on writing HTTP benchmarks](../doc/guides/writing-and-running-benchmarks.md#creating-an-http-benchmark).
+See [the guide on writing HTTP benchmarks](writing-and-running-benchmarks.md#creating-an-http-benchmark).
 
 ### sendResult(data)
 

benchmark/_http-benchmarkers.js

@@ -5,7 +5,7 @@ const path = require('path');
 const fs = require('fs');
 
 const requirementsURL =
-  'https://github.com/nodejs/node/blob/master/doc/guides/writing-and-running-benchmarks.md#http-benchmark-requirements';
+  'https://github.com/nodejs/node/blob/master/benchmark/writing-and-running-benchmarks.md#http-benchmark-requirements';
 
 // The port used by servers and wrk
 exports.PORT = Number(process.env.PORT) || 12346;

doc/guides/contributing/pull-requests.md

@@ -585,7 +585,7 @@ If you want to know more about the code review and the landing process, see the
 [Collaborator Guide][].
 
 [approved]: #getting-approvals-for-your-pull-request
-[benchmark results]: ../writing-and-running-benchmarks.md
+[benchmark results]: ../../../benchmark/writing-and-running-benchmarks.md
 [Building guide]: ../../../BUILDING.md
 [CI (Continuous Integration) test run]: #ci-testing
 [Code of Conduct]: https://github.com/nodejs/admin/blob/master/CODE_OF_CONDUCT.md