Remove no longer needed GITCOOKIE_SH in CI (#4881)

Removed usage of `GITCOOKIE_SH`, which was a script stored in a secret
to authenticate requests against googlesource.com, to avoid hitting
rate limits when pulling go dependencies from that source. Now that we
use go modules, deps are pulled from http://proxy.golang.org/ and this
is no longer needed.

.github/workflows/cloud_integration.yml

@@ -100,11 +100,7 @@ jobs:
         name: testing-${{ env.TAG }}-${{ github.run_id }}
         num_nodes: 2
     - name: Run integration tests
-      env:
+      run: bin/tests --skip-kind-create "$CMD"
-        GITCOOKIE_SH: ${{ secrets.GITCOOKIE_SH }}
-      run: |
-        echo "$GITCOOKIE_SH" | bash
-        bin/tests --skip-kind-create "$CMD"
     - name: CNI tests
       run: |
         export TAG="$($CMD version --client --short)"

.github/workflows/release.yml

@@ -183,11 +183,7 @@ jobs:
         name: testing-${{ steps.install_cli.outputs.tag }}-${{ github.run_id }}
         num_nodes: 2
     - name: Run integration tests
-      env:
+      run: bin/tests --skip-kind-create "$CMD"
-        GITCOOKIE_SH: ${{ secrets.GITCOOKIE_SH }}
-      run: |
-        echo "$GITCOOKIE_SH" | bash
-        bin/tests --skip-kind-create "$CMD"
     - name: CNI tests
       run: |
         export TAG="$($CMD version --client --short)"

.github/workflows/static_checks.yml

@@ -18,11 +18,7 @@ jobs:
       # actions/checkout@v2
       uses: actions/checkout@722adc6
     - name: Go lint
-      env:
+      run: bin/lint --verbose
-        GITCOOKIE_SH: ${{ secrets.GITCOOKIE_SH }}
-      run: |
-        echo "$GITCOOKIE_SH" | bash
-        bin/lint --verbose
   go_format:
     name: Go format
     runs-on: ubuntu-18.04
@@ -33,11 +29,7 @@ jobs:
       # actions/checkout@v2
       uses: actions/checkout@722adc6
     - name: Format
-      env:
+      run: bin/fmt
-        GITCOOKIE_SH: ${{ secrets.GITCOOKIE_SH }}
-      run: |
-        echo "$GITCOOKIE_SH" | bash
-        bin/fmt
   shellcheck:
     name: shellcheck
     runs-on: ubuntu-18.04

.github/workflows/unit_tests.yml

@@ -18,10 +18,7 @@ jobs:
       # actions/checkout@v2
       uses: actions/checkout@722adc6
     - name: Go unit tests
-      env:
-        GITCOOKIE_SH: ${{ secrets.GITCOOKIE_SH }}
       run: |
-        echo "$GITCOOKIE_SH" | bash
         go get gotest.tools/gotestsum@v0.4.2
         # TODO: validate bin/protoc-go.sh does not dirty the repo
         gotestsum -- -cover -race -v -mod=readonly ./...