[Internal] Delete unnecessary API Client constructor (#1172)

## What changes are proposed in this pull request?

This PR deletes `client.NewWithClient`, leaving `client.New` as only
constructor for `DatabricksClient`. This change guarantees that
`httpclient.ApiClient` can now be considered as an implementation detail
of `DatabricksClient` — which enables further abstraction and code
decoupling.

## How is this tested?

Normal CI.

NO_CHANGELOG=true

Author: renaudhartert-db

apps/go.mod

@@ -9,6 +9,7 @@ replace github.com/databricks/databricks-sdk-go/auth => ../auth
 require (
 	github.com/databricks/databricks-sdk-go/databricks v0.0.0-00010101000000-000000000000
 	golang.org/x/exp v0.0.0-20240222234643-814bf88cf225
+	golang.org/x/oauth2 v0.24.0
 )
 
 require (
@@ -32,7 +33,6 @@ require (
 	golang.org/x/crypto v0.31.0 // indirect
 	golang.org/x/mod v0.17.0 // indirect
 	golang.org/x/net v0.33.0 // indirect
-	golang.org/x/oauth2 v0.25.0 // indirect
 	golang.org/x/sys v0.28.0 // indirect
 	golang.org/x/text v0.21.0 // indirect
 	golang.org/x/time v0.5.0 // indirect

apps/go.sum

@@ -98,8 +98,8 @@ golang.org/x/net v0.0.0-20201110031124-69a78807bb2b/go.mod h1:sp8m0HH+o8qH0wwXwY
 golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
 golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
-golang.org/x/oauth2 v0.25.0 h1:CY4y7XT9v0cRI9oupztF8AgiIu99L/ksR/Xp/6jrZ70=
-golang.org/x/oauth2 v0.25.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
+golang.org/x/oauth2 v0.24.0 h1:KTBBxWqUa0ykRPLtV69rRto9TLXcqYkeswu48x/gvNE=
+golang.org/x/oauth2 v0.24.0/go.mod h1:XYTD2NtWslqkgxebSiOHnXEap4TF09sJSc7H1sXbhtI=
 golang.org/x/sync v0.0.0-20180314180146-1d60e4601c6f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20181108010431-42b317875d0f/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=