remove http2 status pseudo header from headers

[KhafraDev]

A much simpler alternative to #2415.

[metcoder95]

LGTM, just small comment 👍

[tsctx]

Hi @KhafraDev,
Could you please add this unit test?

diff --git a/test/http2.js b/test/http2.js
index a3d24f2..71b7749 100644
--- a/test/http2.js
+++ b/test/http2.js
@@ -17,7 +17,7 @@ const isGreaterThanv20 = gte(process.version.slice(1), '20.0.0')
 // https://github.com/nodejs/node/pull/41735
 const hasPseudoHeadersOrderFix = gte(process.version.slice(1), '16.14.1')
 
-plan(22)
+plan(23)
 
 test('Should support H2 connection', async t => {
   const body = []
@@ -1154,3 +1154,38 @@ test(
     t.equal(response.statusCode, 200)
   }
 )
+
+test('The h2 pseudo-headers is not included in the headers', async t => {
+  const server = createSecureServer(pem)
+
+  server.on('stream', (stream, headers) => {
+    stream.respond({
+      ':status': 200
+    })
+    stream.end('hello h2!')
+  })
+
+  server.listen(0)
+  await once(server, 'listening')
+
+  const client = new Client(`https://localhost:${server.address().port}`, {
+    connect: {
+      rejectUnauthorized: false
+    },
+    allowH2: true
+  })
+
+  t.plan(2)
+  t.teardown(server.close.bind(server))
+  t.teardown(client.close.bind(client))
+
+  const response = await client.request({
+    path: '/',
+    method: 'GET'
+  })
+
+  await response.body.text()
+
+  t.equal(response.statusCode, 200)
+  t.equal(response.headers[':status'], undefined)
+})

[mcollina]

lgtm

[codecov-commenter]

Codecov Report

Attention: 62 lines in your changes are missing coverage. Please review.

Comparison is base (e39a632) 85.54% compared to head (30bcbe3) 85.57%.
Report is 95 commits behind head on main.

Files	Patch %	Lines
lib/handler/RetryHandler.js	70.00%	36 Missing ⚠️
lib/fetch/index.js	64.51%	11 Missing ⚠️
lib/fetch/headers.js	87.50%	5 Missing ⚠️
lib/api/readable.js	80.00%	4 Missing ⚠️
lib/client.js	93.10%	2 Missing ⚠️
lib/core/util.js	90.47%	2 Missing ⚠️
lib/core/request.js	96.55%	1 Missing ⚠️
lib/fetch/request.js	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2438      +/-   ##
==========================================
+ Coverage   85.54%   85.57%   +0.02%     
==========================================
  Files          76       77       +1     
  Lines        6858     7055     +197     
==========================================
+ Hits         5867     6037     +170     
- Misses        991     1018      +27     

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