Consolidate upgrade forms

Summary:
Changelog:
[Internal] - Consolidate issue forms instead of separating into to 2.

Reviewed By: sota000

Differential Revision: D32736198

fbshipit-source-id: 73f858ae7dae4fea6c0e5d5a3af7b110b34c6226

.github/ISSUE_TEMPLATE/release_blocker_form.yml

@@ -1,38 +0,0 @@
-name: Release Candidate Blocker
-description: If you are testing a release candidate (0.XX.0-rc.Y) and run into an issue.
-labels: ["Needs: Triage :mag:", "pre-release"]
-body:
-  - type: markdown
-    attributes:
-      value: |
-        Please use this form to file an issue against the current release candidate. See current releases [here](https://github.com/facebook/react-native/releases).
-  - type: input
-    id: version
-    attributes:
-      label: Version
-      description: What release candidate version does this appear on? Please refer to [release candidate versions](https://github.com/facebook/react-native/releases).
-      placeholder: ex. 0.66.0-rc.2
-    validations:
-      required: true
-  - type: input
-    id: target
-    attributes:
-      label: Build Target(s)
-      description: What target(s) are encountering this issue?
-      placeholder: iOS simulator in release flavor
-    validations:
-      required: true
-  - type: textarea
-    id: react-native-info
-    attributes:
-      label: Output of `react-native info`
-      description: Run `react-native info` in your terminal, copy and paste the results here.
-    validations:
-      required: true
-  - type: textarea
-    id: reproduction
-    attributes:
-      label: Issue and Reproduction Steps
-      description: Please describe the issue and list out commands run to reproduce.
-    validations:
-      required: true

.github/ISSUE_TEMPLATE/upgrade-regression-form.yml

@@ -1,5 +1,5 @@
-name: Upgrade Regression
-description: If you are upgrading to a stable release and encounter a regression.
+name: Upgrade - Build Regression
+description: If you are upgrading to a new React Native version (stable or pre-release) and encounter a build regression.
 labels: ["Needs: Triage :mag:", "Type: Upgrade Issue"]
 body:
   - type: markdown