Pass Account Id to OAuthClient in External Browser Authentication.

[parthban-db]

What changes are proposed in this pull request?

Users with membership in multiple Databricks accounts are sent to an incorrect authorization URL with the external-browser auth type in the Java SDK. Because the new DatabricksConfig created in the OAuthClient doesn't include the account ID so getOidcEndpoints returns endpoints with no account ID in the path. Which redirects it to the default account and not the account that was specified in the intial Config.

How is this tested?

Manually tested that it is not the case anymore using the below code.

    public static void main(String[] args) {

        DatabricksConfig config = new DatabricksConfig()
        .setAuthType("external-browser")
        .setHost("https://accounts.cloud.databricks.com")
        .setAccountId("<redacted>")
        .setScopes(List.of("all-apis", "offline_access"))
        .setOAuthRedirectUrl("http://localhost:8022");

        AccountClient acct = new AccountClient(config);
        for (Workspace w: acct.workspaces().list()){
            System.out.println(w.getWorkspaceName());
        }
    }

The current code is not flexible enough to have unit tests in it and needs a bigger refactor. So, unit tests are not added.
NO_CHANGELOG=true

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Inputs:

• PR number: 479
• Commit SHA: 99adb729a361aab4f84d510e21138d0dc2309b43

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