adds get_blob_tags to client

[d-a-v-e]

• Add a new method for fetching a blobs Tags.

• I've successfully used this new method for my own usecase which was retrieving the Malware Scanning scan result generated by Defender for Storage

• I'm unfamiliar with devenv and how exactly to use it for testing this, the below may cover it and I can add it later once I've worked my way around it.

  def test_get_blob_tags
    client.create_block_blob(key, content, metadata: { "tag1" => "value1", "tag2" => "value2" })
  
    tags = client.get_blob_tags(key)
  
    assert_equal({ "tag1" => "value1", "tag2" => "value2" }, tags)
  end

[JoeDupuis]

Thank you for the PR. I am traveling and don't have the right computer with me. I'll test it out when I am back next Monday.

[JoeDupuis]

Tags are set differently than metadata, so I also added support for settings tags to test the feature.

I'm unfamiliar with devenv and how exactly to use it for testing this, the below may cover it and I can add it later once I've worked my way around it.

Yeah, I should probably set a devcontainer and a CI setup.

Thank you for the PR! I'll cut a release shortly.

[d-a-v-e]

Thanks @JoeDupuis 🙏