Release .net client abstractions

[Yury-Fridlyand]

Acceptance criteria

• Nuget packages are available for download and use
• Publish -abstractions NuGet packages #8
• .Net client tested with abstractions library once all PRs done

PR to complete

• Support OpenSearch 2.0 #17
• Fix cluster node started check #18
• Update nuget packages #19
• Bump System.Net.Http from 4.3.1 to 4.3.4 in /src/OpenSearch.OpenSearch.Managed #15

Release Process

https://github.com/opensearch-project/opensearch-net-abstractions/blob/main/RELEASING.md

• Release branch created for 1.0 release
• Release branch created for the next 1.x release

[MaxKsyunz]

@Yury-Fridlyand, @wbeckler, what's the next step in getting this published? All the listed PRs are merged.

[Yury-Fridlyand]

@Yury-Fridlyand, @wbeckler, what's the next step in getting this published? All the listed PRs are merged.

I'm going to test abstractions's main with opensearch-project/opensearch-net#51 to ensure that everything is OK.

[Yury-Fridlyand]

All tests pass: https://github.com/Bit-Quill/opensearch-net/actions?query=branch%3Adev-os-2.0-integ-abstractions

[Yury-Fridlyand]

Since opensearch-project/opensearch-net#92 already merged and .net client released v. 1.1.0, it is not relevant anymore.