Added disable proxy attribute for single replication

[soumyas-dev]

Problem

The local_repository_single_replication Terraform resource was missing support for the disableProxy setting. This made it impossible to manage or disable the proxy configuration for single replication local repositories via Terraform. As a result, users could not control this setting from their IaC workflow, potentially leaving proxies enabled unintentionally.

Example Scenario

A user attempts to provision a local repository with single replication in Artifactory but cannot disable the proxy, as the resource's schema does not accept a disableProxy field:

resource "artifactory_local_repository_single_replication" "example" {
  // ... other settings ...
  // disableProxy = true  # Not supported in previous provider versions
}

Solution

This PR adds support for the disableProxy attribute to the local_repository_single_replication resource.

Example Usage

resource "artifactory_local_repository_single_replication" "example" {
  // ... other settings ...
  disableProxy = true
}

This addition aligns the Terraform provider's capabilities with the Artifactory API and UI, enabling a more complete and user-friendly experience for managing repository replication settings.

Fixes : #1255

[srinivasgowda097]

LGTM