Simplify bug report template (#14925)

Co-authored-by: Rohit Gupta <rohitgr1998@gmail.com>
Co-authored-by: edenlightning <66261195+edenlightning@users.noreply.github.com>

.github/ISSUE_TEMPLATE/1_bug_report.yaml

@@ -1,52 +1,47 @@
 name: Report a bug
 description: Any errors that are not UI related.
-labels: ["needs triage", "bug"]
+labels: ["needs triage"]
 body:
   - type: markdown
     attributes:
       value: >
-        WAIT!
-
         Before you go any further. Is this really a **🐛 bug**?
 
         If it's a question about how Lightning works, have a look at our [Lightning documentation](https://lightning.ai/lightning-docs/)
         or ask a question on our [Community Slack](https://pytorch-lightning.slack.com).
 
-        If it really is a **🐛 bug**, please fill out this form as completely as you can.
-
-  - type: checkboxes
-    id: checks
-    attributes:
-      label: First check
-      description: Please confirm and check all the following options.
-      options:
-        - label: I'm sure this is a bug.
-          required: true
-        - label: I've added a descriptive title to this bug.
-          required: true
-        - label: I've provided clear instructions on how to reproduce the bug.
-          required: true
-        - label: I've added a code sample.
-          required: true
-        - label: I've provided any other important info that is required.
-          required: true
-
   - type: textarea
     attributes:
       label: Bug description
-      description: A clear and concise description of the 🐛bug🐛.
+      description: A description of the 🐛bug🐛.
+      placeholder: |
+        A clear and concise description of what the bug is.
+
+        Include steps to reproduce, the expected behaviour, and the actual behaviour.
+
+        ```
+        The error message you got, with the full traceback if available.
+        ```
+
     validations:
       required: true
 
+  - type: markdown
+    attributes:
+      value: "**Note: The rest of this form is optional, but filling it out may help us to provide better support.**"
+
   - type: textarea
     attributes:
       label: How to reproduce the bug
       description: >
         Provide steps and example code here.
-      placeholder: "# Insert code here"
+      placeholder: |
+        ```python
+        # Sample code to reproduce the problem
+        ```
       render: python
     validations:
-      required: true
+      required: false
 
   - type: textarea
     attributes:
@@ -65,9 +60,18 @@ body:
 
   - type: textarea
     attributes:
-      label: Important info
-      description: >
-        Provide all the following info
+      label: Environment
+      description: |
+        Please provide details about your enviornment by copying and pasting the output from our environment collection script:
+        https://raw.githubusercontent.com/Lightning-AI/lightning/master/requirements/collect_env_details.py
+        (For security purposes, please check the contents of the script before running it)
+        You can get the script and run it with:
+        ```console
+        wget https://raw.githubusercontent.com/Lightning-AI/lightning/master/requirements/collect_env_details.py
+        python collect_env_details.py
+        ```
+
+        You can also fill out the list below manually.
       value: |
         ```
 
@@ -84,7 +88,7 @@ body:
 
         ```
     validations:
-      required: true
+      required: false
 
   - type: textarea
     attributes: