[BUG] Client doesn't handle basic auth passwords with special characters in url correctly

What is the bug?
It seems like OpenSearch::Client doesn't handle hosts/urls that contain passwords in the url with special characters correctly. When making requests with one of these urls, I get an "Unauthorized" error. I believe the problem is that __parse_host doesn't decode the special characters.

How can one reproduce the bug?
Example code snippet:

client = OpenSearch::Client.new(
    url:  "https://user:pass%7D%7Dword@host.docker.internal:15000",
    transport_options: { ssl: { verify: false } }
)
client.search(index: '_all', body: {})

I can however get around this problem by passing a hash in the url parameter that does the decoding myself:

url = URI("https://user:pass%7D%7Dword@host.docker.internal:15000")
client = OpenSearch::Client.new(
  url: {
    scheme: url.scheme,
    user: CGI.unescape(url.user),
    password: CGI.unescape(url.password),
    host: url.host,
    path: url.path,
    port: url.port
  },
  transport_options: { ssl: { verify: false } }
)
client.search(index: '_all', body: {})

What is the expected behavior?
I expect that passwords embedded in the url with standard url encoding should not cause authentication errors

What is your host/environment?

• OS: macOS 12.3.1
• Version: 1.0.0

Start in opensearch-transport/lib/opensearch/transport/client.rb at __parse_host, using the reported OpenSearch::Client URL as the reproduction case. Check how the encoded password is handled before authentication, then verify that the example request succeeds without manually constructing a URL hash.