feat(server): add cloud indexer with Elasticsearch and Manticoresearch providers (#11835)

close CLOUD-137

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->
## Summary by CodeRabbit

- **New Features**
  - Introduced advanced workspace-scoped search and aggregation capabilities with support for complex queries, highlights, and pagination.
  - Added pluggable search providers: Elasticsearch and Manticoresearch.
  - New GraphQL queries, schema types, and resolver support for search and aggregation.
  - Enhanced configuration options for search providers in self-hosted and cloud deployments.
  - Added Docker Compose services and environment variables for Elasticsearch and Manticoresearch.
  - Integrated indexer service into deployment and CI workflows.

- **Bug Fixes**
  - Improved error handling with new user-friendly error messages for search provider and indexer issues.

- **Documentation**
  - Updated configuration examples and environment variable references for indexer and search providers.

- **Tests**
  - Added extensive end-to-end and provider-specific tests covering indexing, searching, aggregation, deletion, and error cases.
  - Included snapshot tests and test fixtures for search providers.

- **Chores**
  - Updated deployment scripts, Helm charts, and Kubernetes manifests to include indexer-related environment variables and secrets.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/build-test.yml

@@ -577,7 +577,25 @@ jobs:
         ports:
           - 1025:1025
           - 8025:8025
+      manticoresearch:
+        image: manticoresearch/manticore:9.2.14
+        ports:
+          - 9308:9308
     steps:
+      # https://github.com/elastic/elastic-github-actions/blob/master/elasticsearch/README.md
+      - name: Configure sysctl limits for Elasticsearch
+        run: |
+          sudo swapoff -a
+          sudo sysctl -w vm.swappiness=1
+          sudo sysctl -w fs.file-max=262144
+          sudo sysctl -w vm.max_map_count=262144
+
+      - name: Runs Elasticsearch
+        uses: elastic/elastic-github-actions/elasticsearch@master
+        with:
+          stack-version: 9.0.1
+          security-enabled: false
+
       - uses: actions/checkout@v4
 
       - name: Setup Node.js
@@ -639,6 +657,10 @@ jobs:
         image: redis
         ports:
           - 6379:6379
+      indexer:
+        image: manticoresearch/manticore:9.2.14
+        ports:
+          - 9308:9308
     steps:
       - uses: actions/checkout@v4
 
@@ -1076,6 +1098,10 @@ jobs:
         ports:
           - 1025:1025
           - 8025:8025
+      indexer:
+        image: manticoresearch/manticore:9.2.14
+        ports:
+          - 9308:9308
     steps:
       - uses: actions/checkout@v4