import provisioner partials from Packer core (#77)

* import provisioner partials from Packer core

* Delete community_provisioners.mdx

cmd/packer-sdc/internal/renderdocs/docs-partials/packer-plugin-sdk/provisioners/common-config.mdx

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+Parameters common to all provisioners:
+
+- `pause_before` (duration) - Sleep for duration before execution.
+
+- `max_retries` (int) - Max times the provisioner will retry in case of failure. Defaults to zero (0). Zero means an error will not be retried.
+
+- `only` (array of string) - Only run the provisioner for listed builder(s)
+  by name.
+
+- `override` (object) - Override the builder with different settings for a
+  specific builder, eg :
+
+  In HCL2:
+
+  ```hcl
+  source "null" "example1" {
+    communicator = "none"
+  }
+
+  source "null" "example2" {
+    communicator = "none"
+  }
+
+  build {
+    sources = ["source.null.example1", "source.null.example2"]
+    provisioner "shell-local" {
+      inline = ["echo not overridden"]
+      override = {
+        example1 = {
+          inline = ["echo yes overridden"]
+        }
+      }
+    }
+  }
+  ```
+
+  In JSON:
+
+  ```json
+  {
+    "builders": [
+      {
+        "type": "null",
+        "name": "example1",
+        "communicator": "none"
+      },
+      {
+        "type": "null",
+        "name": "example2",
+        "communicator": "none"
+      }
+    ],
+    "provisioners": [
+      {
+        "type": "shell-local",
+        "inline": ["echo not overridden"],
+        "override": {
+          "example1": {
+            "inline": ["echo yes overridden"]
+          }
+        }
+      }
+    ]
+  }
+  ```
+
+- `timeout` (duration) - If the provisioner takes more than for example
+  `1h10m1s` or `10m` to finish, the provisioner will timeout and fail.

cmd/packer-sdc/internal/renderdocs/docs-partials/packer-plugin-sdk/provisioners/shell-config.mdx

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+The reference of available configuration options is listed below. The only
+required element is either "inline" or "script". Every other option is
+optional.
+
+Exactly _one_ of the following is required:
+
+- `inline` (array of strings) - This is an array of commands to execute. The
+  commands are concatenated by newlines and turned into a single file, so
+  they are all executed within the same context. This allows you to change
+  directories in one command and use something in the directory in the next
+  and so on. Inline scripts are the easiest way to pull off simple tasks
+  within the machine.
+
+- `script` (string) - The path to a script to upload and execute in the
+  machine. This path can be absolute or relative. If it is relative, it is
+  relative to the working directory when Packer is executed.
+
+- `scripts` (array of strings) - An array of scripts to execute. The scripts
+  will be uploaded and executed in the order specified. Each script is
+  executed in isolation, so state such as variables from one script won't
+  carry on to the next.
+
+Optional parameters:
+
+- `binary` (boolean) - If true, specifies that the script(s) are binary
+  files, and Packer should therefore not convert Windows line endings to Unix
+  line endings (if there are any). By default this is false.
+
+- `valid_exit_codes` (list of ints) - Valid exit codes for the script. By
+  default this is just 0.

cmd/packer-sdc/internal/renderdocs/docs-partials/packer-plugin-sdk/provisioners/unmaintained-plugin.mdx

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+~> **This community maintained provisioner is currently unmaintained**; if you are interested in contributing or taking ownership of it, please reach out to us at [packer@hashicorp.com](mailto://packer@hashicorp.com). More details can be found in the [README](https://github.com/hashicorp/packer/blob/master/README.md#unmaintained-plugins).