New Sink: Webex (robusta-dev#560)

* updated forwarder and runner serviceaccount permission for clusterrolebindings

* Job Action Added

* Webex Sink Integration (robusta-dev#3)

* Added webex_sink

* Bug fix with fileblocks, code refactoring, documentation add and minor bug fixes

* Delete job_restart_on_oomkilled.py

* Updated Webex_Sink (robusta-dev#6)

* Added webex_sink

* Bug fix with fileblocks, code refactoring, documentation add and minor bug fixes

* Added Enums and replaced emoji code with emoji icons

* Removed PDF functionality and separated JSON logic from adaptive card function. (robusta-dev#7)

* Added webex_sink

* Bug fix with fileblocks, code refactoring, documentation add and minor bug fixes

* Added Enums and replaced emoji code with emoji icons

* Removed PDF functionality and seperated JSON creation logic from the adaptivecard function logic

* Formatted using Black

* Changes in _send_files and _separate_blocks function (robusta-dev#8)

* Added webex_sink

* Bug fix with fileblocks, code refactoring, documentation add and minor bug fixes

* Added Enums and replaced emoji code with emoji icons

* Removed PDF functionality and seperated JSON creation logic from the adaptivecard function logic

* Formatted using Black

* Changes in _send_files and _separate_blocks function

* Changes in _send_files and _separate_blocks function (robusta-dev#9)

* Added webex_sink

* Bug fix with fileblocks, code refactoring, documentation add and minor bug fixes

* Added Enums and replaced emoji code with emoji icons

* Removed PDF functionality and seperated JSON creation logic from the adaptivecard function logic

* Formatted using Black

* Changes in _send_files and _separate_blocks function

Co-authored-by: wahajXgrid <wahaj.ali@xgrid.co>
Co-authored-by: wahajXgrid <107921443+wahajXgrid@users.noreply.github.com>

docs/catalog/sinks/index.rst

@@ -20,6 +20,7 @@ The following sinks are supported:
 * :ref:`PagerDuty` - send playbooks results to the PagerDuty alerts API
 * :ref:`Discord` - send playbooks results to the Discord using webhook
 * :ref:`Mattermost` - send playbooks results to the Mattermost using webhook
+* :ref:`Webex` - send playbooks results to the Webex using webhook
 
 **Need support for something not listed here?** `Tell us and we'll add it to the code. <https://github.com/robusta-dev/robusta/issues/new?assignees=&labels=&template=feature_request.md&title=New%20Sink:>`_
 
@@ -67,6 +68,7 @@ if it has the field `default: true` in the YAML.
    ms-teams
    mattermost
    webhook
+   webex
    Opsgenie
    VictorOps
    PagerDuty

docs/catalog/sinks/webex.rst

@@ -0,0 +1,66 @@
+Webex
+#################
+
+Robusta can send playbook results to Webex.
+
+To configure the Webex sink we will need the Webex bot settings
+
+.. note::
+
+    2-way interactivity (``CallbackBlock``) isn't implemented yet.
+
+
+Create your bot access token
+------------------------------------------------
+
+1. `Create a new bot. <https://developer.webex.com/my-apps/new/bot>`_
+2. Copy and save your bot access token
+
+.. image:: /images/webex_sink/bot_access_token.png
+  :width: 600
+  :align: center
+
+3. Copy and save your bot username
+
+.. image:: /images/webex_sink/bot_username.png
+  :width: 600
+  :align: center
+
+Get your webex room ID
+------------------------------------------------
+
+1. `Click the run button here to list your room IDs. <https://developer.webex.com/docs/api/v1/rooms/list-rooms>`_ . 
+Copy the room ID of **the room to which you want to send Robusta notifications**.
+
+.. image:: /images/webex_sink/room_id.png
+  :width: 600
+  :align: center
+
+2. Go to `Webex spaces <https://web.webex.com/spaces>`_ **> Your space/room > People > Add People > Paste your bot username (email) > Invite > Add**. 
+
+.. note::
+  The bot must be invited to the same room of which you copied the ID of in step 1.
+
+.. image:: /images/webex_sink/add_webex_bot_to_space.png
+  :width: 600
+  :align: center
+
+Configuring the webex sink
+------------------------------------------------
+Now we're ready to configure the webex sink.
+
+.. admonition:: generated-values.yaml
+
+    .. code-block:: yaml
+
+        sinks_config:
+        - webex_sink:
+            name: personal_webex_sink
+            bot_access_token: <YOUR BOT ACCESS TOKEN>
+            room_id: <YOUR ROOM ID>
+
+You should now get playbooks results in Webex! Example is shown below:
+
+.. image:: /images/webex_sink/webex_sink_example.png
+  :width: 1000
+  :align: center