chore: Remove obsolete build files (#12700)

* chore: Remove obsolete cloudbuild file

* Remove coderabbit

* remove snyk

.coderabbit.yml

-language: "en"
-early_access: false
-reviews:
-  high_level_summary: false
-  poem: false
-  review_status: false
-  collapse_walkthrough: true
-  path_filters:
-    - "!**/*.json"
-  path_instructions:
-    - path: "**.sol"
-      instructions: "Focus on the following areas:
-        - Security
-        - Identifying test cases which are lacking
-        - Removing unnecessary code
-      "
-  auto_review:
-    enabled: false
-    drafts: false
-    base_branches:
-      - "develop"
-      - "feat/*"
-chat:
-  auto_reply: true

.snyk

-exclude:
-  global:
-    - infra/op-replica/**  # snyk does not respect kustomizations, so not useful here

cloudbuild.yaml

-steps:
-  - name: 'gcr.io/kaniko-project/executor:latest'
-    args:
-      - --destination=us-central1-docker.pkg.dev/$PROJECT_ID/images/deployer-bedrock:$_TAG
-      - --destination=us-central1-docker.pkg.dev/$PROJECT_ID/images/deployer-bedrock:$COMMIT_SHA
-      - --dockerfile=./ops/docker/Dockerfile.packages
-      - --target=deployer-bedrock
-      - --cache=true
-      - --cache-ttl=48h
-    waitFor: ['-']
-options:
-  machineType: N1_HIGHCPU_32