[Misc] Added issue/commit_message templates for github publish

Summary: Added templates for issues and commit messages

Test Plan: N/A

Reviewed-by: kuaiwei.kw sanhong.lsh

Issue: https://aone.alibaba-inc.com/project/911689/task/23787840


Rebased from commit 9310204: [Misc] Added issue/commit_message templates for github publish

.github/ISSUE_TEMPLATE/alibaba-dragonwell-bug-report.md

+---
+name: Alibaba Dragonwell bug report
+about: Create a report to help us improve
+title: "[Bug] A new bug"
+labels: ''
+assignees: ''
+
+---
+
+**Description**
+A clear and concise description of what the bug is.
+
+**Steps to Reproduce**
+Steps to reproduce the behavior:
+1. Save below snippet '...'
+2. Compile it with javac '....'
+3. Execute with VM options '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**JDK version**
+The output of `java -version` command
+
+**Execution environment**
+ - OS and version:
+ - CPU model:
+ - Number of CPU cores:
+ - Size of physical memory:
+ - Inside Linux container?
+   - Linux container name (docker, pouch, etc):
+   - Linux container version:

.github/commit_message_template

+[<tag>] <One-line description of the patch>
+#
+# <tag> can be:
+#   GC        Dragonwell specific JVM GC changes
+#   Runtime   Dragonwell specific JVM runtime changes
+#   JIT       Dragonwell Just-in-Time compiler changes
+#   JFR       JFR related
+#   JWarmUp   JWarmUp related
+#   Misc      Miscellaneous changes, such as Makefile, scripts
+#
+
+Summary: <detailed description of the change>
+#
+# Detailed description of the changes
+#   Problems fixed by this change
+#   New features added by this change
+#
+
+Test Plan: <how this patch has been tested>
+#
+# Please explain
+#   - Approaches used
+#   - Testsuites selected.
+#
+
+Reviewed-by: <Github IDs of reviewers>
+#
+# For code changes, at least two reviewers required
+#
+
+Issue: <full URL or #github_tag>
+#
+# Link of the fixed issue, can be full URL or github bug id (e.g. #123)
+#
+