intergrate opensearch v2 (#5044)

intergrate opensearch

Signed-off-by: chengdehao <dehaocheng@kubesphere.io>

Co-authored-by: chengdehao <dehaocheng@kubesphere.io>

vendor/github.com/opensearch-project/opensearch-go/v2/DEVELOPER_GUIDE.md

@@ -0,0 +1,76 @@
+- [Developer Guide](#developer-guide)
+  - [Getting Started](#getting-started)
+    - [Git Clone OpenSearch Go Client Repository](#git-clone-opensearch-go-client-repository)
+    - [Install Prerequisites](#install-prerequisites)
+      - [Go 1.11](#go-111)
+      - [Docker](#docker)
+    - [Unit Testing](#unit-testing)
+    - [Integration Testing](#integration-testing)
+      - [Execute integration tests from your terminal](#execute-integration-tests-from-your-terminal)
+  - [Use an Editor](#use-an-editor)
+    - [GoLand](#goland)
+# Developer Guide
+
+So you want to contribute code to the OpenSearch Go Client?  Excellent!  We're glad you're here.  Here's what you need to do:
+
+## Getting Started
+
+### Git Clone OpenSearch Go Client Repository
+
+Fork [opensearch-project/opensearch-go](https://github.com/opensearch-project/opensearch-go) and clone locally,
+e.g. `git clone https://github.com/[your username]/opensearch-go.git`.
+
+### Install Prerequisites
+
+#### Go 1.11
+OpenSearch Go Client builds using [Go](https://golang.org/doc/install) 1.11 at a minimum.
+
+#### Docker
+
+[Docker](https://docs.docker.com/install/) is required for building some OpenSearch artifacts and executing integration tests.
+
+### Unit Testing
+Go has a simple tool for running tests, and we simplified it further by creating this make command:
+ ```
+make test-unit
+```
+ 
+Individual unit tests can be run with the following command:
+```
+cd folder-path/to/test;
+go test -v -run TestName; 
+```
+
+### Integration Testing
+In order to test opensearch-go client, you need a running OpenSearch cluster. You can use Docker to accomplish this. 
+The [Docker Compose file](.ci/opensearch/docker-compose.yml) supports the ability to run integration tests for the project in local environments.
+If you have not installed docker-compose, you can install it from this [link](https://docs.docker.com/compose/install/).
+
+In order to differentiate unit tests from integration tests, Go has a built-in mechanism for allowing you to logically separate your tests
+with [build tags](https://pkg.go.dev/cmd/go#hdr-Build_constraints). The build tag needs to be placed as close to the top of the file as possible, and must have a blank line beneath it.
+Hence, create all integration tests with build tag 'integration'.
+
+#### Execute integration tests from your terminal
+1. Run below command to start containers. By default, it will launch latest OpenSearch cluster.
+   ```
+   make cluster.opensearch.build cluster.opensearch.start
+   ```
+2. Run all integration tests.
+   ```
+   make test-integ race=true
+   ```
+3. Stop and clean containers.
+   ```
+   make cluster.opensearch.stop cluster.clean
+   ```
+## Use an Editor
+
+### GoLand
+You can import the OpenSearch project into GoLand as follows:
+
+1. Select **File | Open**
+2. In the subsequent dialog navigate to the ~/go/src/opensearch-go and click **Open**
+
+After you have opened your project, you need to specify the location of the Go SDK.
+You can either specify a local path to the SDK or download it. To set the Go SDK, navigate to **Go | GOROOT** and 
+set accordingly.