CONSOLE-5204: Merge PR templates

Remove legacy console and devconsole PR templates from .github/PULL_REQUEST_TEMPLATE and add a single consolidated docs/pull_request_template.md. The new template centralizes required PR metadata (fixes, analysis, solution, screenshots, test cases, browser conformance, and reviewers) to standardize submissions and streamline triage and review.

See https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/creating-a-pull-request-template-for-your-repository#adding-a-pull-request-template

Author: logonoff

.github/PULL_REQUEST_TEMPLATE/console_pr.md

@@ -0,0 +1,55 @@
+<!--
+  Please fill in every section below before requesting review. Filled-in descriptions are
+  required for the OpenShift Console team to triage the pull request, review the code, and
+  verify the behavior end-to-end.
+-->
+
+**Fixes**: https://redhat.atlassian.net/browse/
+<!--The pull request title must be prefixed with a Jira issue or Bugzilla bug in order to be merged. For example:
+    For e.g Features: https://redhat.atlassian.net/browse/CONSOLE-XXXX
+    - CONSOLE-XXXX: <title>
+    For e.g Jira Bug Fixes: https://redhat.atlassian.net/browse/OCPBUGS-XXXX
+    - OCPBUGS-XXXX: <title>
+    For e.g Bugzilla Bug Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=XXXXXXX"
+    - Bug XXXXXXX: <title>
+    Combos:
+    - CONSOLE-XXXX, Bug XXXXXXX: <title>-->
+
+**Analysis / Root cause**:
+<!-- Briefly describe analysis of US/Task or root cause of Defect -->
+
+**Solution Description**:
+<!-- Describe your code changes in detail and explain the solution or functionality -->
+
+**Screenshots / screen recording**:
+<!-- Add screenshots or screen recordings for visual changes. Be sure to include before and after videos where relevant -->
+
+**Test setup:**
+<!-- If any setup required to test this PR, mention the details -->
+
+**Test cases:**
+<!-- List possible test cases to validate the changes. -->
+
+**Browser conformance**:
+<!-- To mark tested browsers, use [x] -->
+- [ ] Chrome
+- [ ] Firefox
+- [ ] Safari (or Epiphany on Linux)
+
+**Additional info:**
+<!-- Add any additional info here -->
+
+**Reviewers and assignees:**
+<!--
+- Tag an OCP console engineer to review the changes and verify the functionality.
+- If there are visual, content, or interaction changes in the PR, tag "@openshift/team-ux-review"
+- If the PR is implementing a story, assign Docs, and PX approvers:
+  Console Approver:
+  /assign <gh-user>
+
+  Docs approver:
+  /assign <gh-user>
+
+  PX approver:
+  /assign <gh-user>
+-->