Support multiple dockerimage tools in Devfile

[sleshchenko]

Description

Support multiple dockerimage tools in Devfile.
We can not use dockerimage recipe for representation of dockerimage tool because workspace config can have only one dockerimage recipe. The possible solution here is to generate a k8s deployment for dockerimage tool and then merge multiple dockerimage related deployments to one deployment.

Implementation details

1. The logic about parsing k8s/os recipe and provisioning some objects there should be extracted from KubernetesToolToWorkspaceConfigApplier after merge of https://github.com/eclipse/che/pull/12842/files#diff-433beefd65ee6f2da3b5fc799536bd3bR126.
2. A dedicated pod should be provisioned to workspace config recipe, pod should contain:

• image;
• command;
• args;
• memoryLimit;
• env vars;

3. Workspace config should be provisioned with new machine config entry where we would provision the following configuration:

• volumes (including projects volume if mountSources is specified);
• endpoints.
  * We could convert this configuration to k8s/os objects as well, but it would be a tricky part that will duplicate a logic that is already implemented on Che Server side. I think that provisioning machine config and letting Che Server to do all needed work will be good enough.

P.S. Implementation details are not final decision but result of short investigate that was done.

[sleshchenko]

Short investigation was done and the result is described in Implementation details section of issue description.