[chore] add a gh action that automatically tidies (open-telemetry#21902)

This will run when PRs with the label "dependencies" are added. In the short term, I'm leaving both dependabot and renovatebot on. Ideally, after seeing renovatebot run this week, we may be able to turn off dependabot for dependencies.
---------

Signed-off-by: Alex Boten <[email protected]>
Co-authored-by: Antoine Toulme <[email protected]>

.github/workflows/tidy-dependencies.yml

@@ -0,0 +1,43 @@
+name: "Project: Tidy"
+on:
+  pull_request:
+    types: [labeled]
+    branches:
+      - main
+
+jobs:
+  setup-environment:
+    timeout-minutes: 30
+    runs-on: ubuntu-latest
+    if: ${{ github.event.label.name == 'dependencies' }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          ref: ${{ github.head_ref }}
+      - uses: actions/setup-go@v4
+        with:
+          go-version: 1.19
+          cache: false
+      - name: Cache Go
+        id: go-cache
+        uses: actions/cache@v3
+        with:
+          path: |
+            ~/go/bin
+            ~/go/pkg/mod
+          key: go-cache-${{ runner.os }}-${{ hashFiles('**/go.sum') }}
+      - name: Install dependencies
+        if: steps.go-cache.outputs.cache-hit != 'true'
+        run: make -j2 gomoddownload
+      - name: Install Tools
+        if: steps.go-cache.outputs.cache-hit != 'true'
+        run: make install-tools
+      - name: go mod tidy
+        run: |
+          make gotidy
+          git config user.name opentelemetrybot
+          git config user.email [email protected]
+          echo "git diff --exit-code || (git add . && git commit -m \"go mod tidy\" && git push)"
+          git diff --exit-code || (git add . && git commit -m "go mod tidy" && git push)
+        env:
+          GITHUB_TOKEN: ${{ secrets.OPENTELEMETRYBOT_GITHUB_TOKEN }}

renovate.json

@@ -6,7 +6,7 @@
     "extends": [
       "config:base"
     ],
-    "schedule": ["every wednesday"],
+    "schedule": ["every tuesday"],
     "ignorePaths": [
       "**/receiver/elasticsearchreceiver/testdata/integration/Dockerfile.elasticsearch.7_0_0",
       "**/receiver/elasticsearchreceiver/testdata/integration/Dockerfile.elasticsearch.7_16_3",
@@ -31,7 +31,10 @@
       },
       {
         "matchManagers": ["gomod"],
-        "enabled": false
+        "matchUpdateTypes": ["minor", "major"]
       }
+    ],
+    "ignoreDeps": [
+      "github.com/mattn/go-ieproxy"
     ]
   }