[GHA] Benchmark job

# Motivation

We need to run our `benchmark-package` based benchmarks on GH action as well. This is another part that we can make reusable for other packages.

# Modification

Add a new `benchmarks-linux` job to the reusable workflow.

# Result

One more CI flow migrated.

.github/workflows/reusable_pull_request.yml

@@ -6,7 +6,14 @@ on:
       unit_tests_linux_enabled:
         type: boolean
         description: "Boolean to enable the unit tests linux job. Defaults to true."
+      benchmarks_linux_enabled:
+        type: boolean
+        description: "Boolean to enable the benchmarks linux job. Defaults to true."
         default: true
+      benchmarks_linux_package_path:
+        type: string
+        description: "Path to the package containing the benchmarks. Defaults to the repository root."
+        default: "."
       api_breakage_check_enabled:
         type: boolean
         description: "Boolean to enable the API breakage check job. Defaults to true."
@@ -51,6 +58,36 @@ jobs:
       uses: actions/checkout@v4
     - name: Run tests
       run: swift test
+
+  benchmarks-linux:
+    name: Benchmarks
+    if: ${{ inputs.benchmarks_linux_enabled }}
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        swift:
+        - image: swift:5.8-jammy
+          swift_version: 5.8
+        - image: swift:5.9-jammy
+          swift_version: 5.9
+        - image: swift:5.10-noble
+          swift_version: 5.10
+        - image: swiftlang/swift:nightly-6.0-jammy
+          swift_version: nightly-next
+        - image: swiftlang/swift:nightly-main-jammy
+          swift_version: nightly-main
+    container:
+      image: ${{ matrix.swift.image }}
+    timeout-minutes: 20
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+    - name: Run tests
+      env:
+        PACKAGE_PATH: ${{ inputs.benchmarks_linux_package_path }}
+        SWIFT_VERSION: ${{ matrix.swift.swift_version }}
+      run: swift package --package-path ${PACKAGE_PATH} benchmark --disable-sandbox baseline check --check-absolute-path Thresholds/$${SWIFT_VERSION-}/
 
   api-breakage-check:
     name: API breakage check

Benchmarks/Thresholds/nightly-next/NIOCoreBenchmarks.NIOAsyncChannel.init.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 12
+}

Benchmarks/Thresholds/nightly-next/NIOPosixBenchmarks.TCPEcho.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 108
+}

Benchmarks/Thresholds/nightly-next/NIOPosixBenchmarks.TCPEchoAsyncChannel.p90.json

@@ -0,0 +1,3 @@
+{
+  "mallocCountTotal" : 165000
+}