IBM Cloud CLI Task for tekton

- Initial Release inspired by `az` for the IBM Cloud CLI in the catalog

Signed-off-by: JJ Asghar <jjasghar@gmail.com>

ibmcloud-cli/OWNERS

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+approvers:
+- jjasghar
+
+reviewers:
+- jjasghar

ibmcloud-cli/README.md

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+# `ibmcloud`
+
+This task performs operations on IBM Cloud using the `ibmcloud`
+
+## Install the Task
+
+```
+kubectl apply -f https://raw.githubusercontent.com/tektoncd/catalog/master/ibmcloud-cli/ibmcloud-cli.yaml
+```
+
+## Parameters
+
+* **ibmcloud-image**: `ibmcloud` CLI container image to run this task.
+
+  _default_: `ibmcom/ibm-cloud-developer-tools-amd64:latest`
+
+  You can use a specific version of the `ibmcloud` CLI by specifying the `ibmcloud-image` param with the `ibmcom/ibm-cloud-developer-tools-amd64` image tagged with the specific version of the CLI you would like to use.  A full list of available version tags can be found under the [Full Tag Listing](https://hub.docker.com/r/ibmcom/ibm-cloud-developer-tools-amd64/tags) section of the `ibm-cloud-developer-tools-amd64` Docker Hub.
+
+* **ARGS**: The arguments to pass to `ibmcloud` CLI. This parameter is required to run this task.
+
+## Usage
+
+### Running the Task
+
+After creating the task, you should now be able to execute `ibmcloud` commands by specifying the command you would like to run as the `ARGS` param. The `ARGS` param takes an array of `ibmcloud` subcommands that will be executed as part of this task.
+
+### Examples
+
+Run `ibmcloud ks --help` using `ibmcloud`. Start the task using the Tekton CLI (`tkn`):
+
+```shell
+tkn task start ibmcloud -p ARGS=ks,--help
+```
+
+Specify a different `ibmcloud-image` to use with the `ibmcloud` task:
+
+```shell
+tkn task start ibmcloud -p ibmcloud-image=ibmcom/ibm-cloud-developer-tools-amd64:1.1.0
+```

ibmcloud-cli/ibmcloud-cli.yaml

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+apiVersion: tekton.dev/v1beta1
+kind: Task
+metadata:
+  name: ibmcloud
+spec:
+  params:
+  - name: ibmcloud-image
+    description: IBM Cloud CLI container image to run this task
+    default: ibmcom/ibm-cloud-developer-tools-amd64:latest
+  - name: ARGS
+    type: array
+    description: IBM Cloud CLI arguments to run
+  steps:
+  - name: ibmcloud
+    image: "$(params.ibmcloud-image)"
+    command: ["ibmcloud"]
+    args: ["$(params.ARGS)"]