chore: remove trivy GHA job (#23415)

Action taken In response to an ongoing incident:

https://www.aquasec.com/blog/trivy-supply-chain-attack-what-you-need-to-know/

> We've not been compromised due to a combination of pinning [GitHub
Actions by commit
SHA](https://github.com/coder/coder/blob/c8e58575e0ee44fad37b5f2ffe1ef0f220c3cf23/.github/workflows/security.yaml#L149)
coupled with a [dependabot cooldown
period](https://github.com/coder/coder/pull/21079)

.github/workflows/security.yaml

@@ -63,116 +63,3 @@ jobs:
             --data "{\"content\": \"$msg\"}" \
             "${{ secrets.SLACK_SECURITY_FAILURE_WEBHOOK_URL }}"
 
-  trivy:
-    permissions:
-      security-events: write
-    runs-on: ${{ github.repository_owner == 'coder' && 'depot-ubuntu-22.04-8' || 'ubuntu-latest' }}
-    steps:
-      - name: Harden Runner
-        uses: step-security/harden-runner@fa2e9d605c4eeb9fcad4c99c224cee0c6c7f3594 # v2.16.0
-        with:
-          egress-policy: audit
-
-      - name: Checkout
-        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-
-      - name: Setup Go
-        uses: ./.github/actions/setup-go
-
-      - name: Setup Node
-        uses: ./.github/actions/setup-node
-
-      - name: Setup sqlc
-        uses: ./.github/actions/setup-sqlc
-
-      - name: Install cosign
-        uses: ./.github/actions/install-cosign
-
-      - name: Install syft
-        uses: ./.github/actions/install-syft
-
-      - name: Install yq
-        run: go run github.com/mikefarah/yq/v4@v4.44.3
-      - name: Install mockgen
-        run: ./.github/scripts/retry.sh -- go install go.uber.org/mock/mockgen@v0.6.0
-      - name: Install protoc-gen-go
-        run: ./.github/scripts/retry.sh -- go install google.golang.org/protobuf/cmd/protoc-gen-go@v1.30
-      - name: Install protoc-gen-go-drpc
-        run: ./.github/scripts/retry.sh -- go install storj.io/drpc/cmd/protoc-gen-go-drpc@v0.0.34
-      - name: Install Protoc
-        run: |
-          # protoc must be in lockstep with our dogfood Dockerfile or the
-          # version in the comments will differ. This is also defined in
-          # ci.yaml.
-          set -euxo pipefail
-          cd dogfood/coder
-          mkdir -p /usr/local/bin
-          mkdir -p /usr/local/include
-
-          DOCKER_BUILDKIT=1 docker build . --target proto -t protoc
-          protoc_path=/usr/local/bin/protoc
-          docker run --rm --entrypoint cat protoc /tmp/bin/protoc > $protoc_path
-          chmod +x $protoc_path
-          protoc --version
-          # Copy the generated files to the include directory.
-          docker run --rm -v /usr/local/include:/target protoc cp -r /tmp/include/google /target/
-          ls -la /usr/local/include/google/protobuf/
-          stat /usr/local/include/google/protobuf/timestamp.proto
-
-      - name: Build Coder linux amd64 Docker image
-        id: build
-        run: |
-          set -euo pipefail
-
-          version="$(./scripts/version.sh)"
-          image_job="build/coder_${version}_linux_amd64.tag"
-
-          # This environment variable force make to not build packages and
-          # archives (which the Docker image depends on due to technical reasons
-          # related to concurrent FS writes).
-          export DOCKER_IMAGE_NO_PREREQUISITES=true
-          # This environment variables forces scripts/build_docker.sh to build
-          # the base image tag locally instead of using the cached version from
-          # the registry.
-          CODER_IMAGE_BUILD_BASE_TAG="$(CODER_IMAGE_BASE=coder-base ./scripts/image_tag.sh --version "$version")"
-          export CODER_IMAGE_BUILD_BASE_TAG
-
-          # We would like to use make -j here, but it doesn't work with the some recent additions
-          # to our code generation.
-          make "$image_job"
-          echo "image=$(cat "$image_job")" >> "$GITHUB_OUTPUT"
-
-      - name: Run Trivy vulnerability scanner
-        uses: aquasecurity/trivy-action@57a97c7e7821a5776cebc9bb87c984fa69cba8f1 # v0.34.0
-        with:
-          image-ref: ${{ steps.build.outputs.image }}
-          format: sarif
-          output: trivy-results.sarif
-          severity: "CRITICAL,HIGH"
-
-      - name: Upload Trivy scan results to GitHub Security tab
-        uses: github/codeql-action/upload-sarif@5d4e8d1aca955e8d8589aabd499c5cae939e33c7 # v3.29.5
-        with:
-          sarif_file: trivy-results.sarif
-          category: "Trivy"
-
-      - name: Upload Trivy scan results as an artifact
-        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
-        with:
-          name: trivy
-          path: trivy-results.sarif
-          retention-days: 7
-
-      - name: Send Slack notification on failure
-        if: ${{ failure() }}
-        run: |
-          msg="❌ Trivy Failed\n\nhttps://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
-          curl \
-            -qfsSL \
-            -X POST \
-            -H "Content-Type: application/json" \
-            --data "{\"content\": \"$msg\"}" \
-            "${{ secrets.SLACK_SECURITY_FAILURE_WEBHOOK_URL }}"