Add GlusterFS 11.2 release notes (#4592)

* Add GlusterFS 11.2 release notes

* add addressed issues to release notes

* add version changes in release notes

Author: sanjurakonde

VERSION

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+v11.2-0

doc/release-notes/11.2.md

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+# Release notes for Gluster 11.2
+
+This is a bugfix release. The release notes for [11.2](11.2.md) contains a listing of all the new improvements and bugs fixed in the GlusterFS 11.2 release.
+
+**NOTE:**
+- Next minor release tentative date: Release will be based on requirement only
+- Users are highly encouraged to upgrade to newer releases of GlusterFS.
+
+## Important fixes in this release
+- Regression suite tests failures are addressed
+
+## Builds are available at
+
+[https://github.com/gluster/glusterfs/releases](https://github.com/gluster/glusterfs/releases)
+
+## Issues addressed in this release
+
+[#4561](https://github.com/gluster/glusterfs/pull/4561) afr: fix race between __afr_eager_lock_handle and afr_wakeup_same_fd_delayed_op
+[#4562](https://github.com/gluster/glusterfs/pull/4562) tests: robustness enhancement of regression tests 
+[#4563](https://github.com/gluster/glusterfs/pull/4563) events: avoid zombie processes after reloading 
+[#4564](https://github.com/gluster/glusterfs/pull/4564) Fix cluster.rc tests with a hack for now 
+[#4565](https://github.com/gluster/glusterfs/pull/4565) Increase xfs partition size to 300M 
+[#4566](https://github.com/gluster/glusterfs/pull/4566) Trigger read txn to trigger heal
+[#4567](https://github.com/gluster/glusterfs/pull/4567) Trigger read txn to trigger heal
+[#4568](https://github.com/gluster/glusterfs/pull/4568) Fix compilation error for test run
+[#4569](https://github.com/gluster/glusterfs/pull/4569) Disable write-behind to prevent close-behind
+[#4570](https://github.com/gluster/glusterfs/pull/4570) tests: address XFS 300M minimum size
+[#4571](https://github.com/gluster/glusterfs/pull/4571) Fix lvm setup so that snapshot tests pass
+[#4572](https://github.com/gluster/glusterfs/pull/4572) Adjust sizes based on free size available
+[#4573](https://github.com/gluster/glusterfs/pull/4573) Adjust min xfs fs size
+[#4574](https://github.com/gluster/glusterfs/pull/4574) Fix the pattern to be matched
+[#4575](https://github.com/gluster/glusterfs/pull/4575) s/gawk/awk
+[#4576](https://github.com/gluster/glusterfs/pull/4576) Deduplication of changelogs in a batch
+[#4577](https://github.com/gluster/glusterfs/pull/4577) create home directory for user
+[#4579](https://github.com/gluster/glusterfs/pull/4579) glusterfsd/mgmt: Connect backup volfile-server in round robin
+[#4580](https://github.com/gluster/glusterfs/pull/4580) glfs/open: dentry lists are not initialized
+[#4581](https://github.com/gluster/glusterfs/pull/4581) api/glfs: Fix use after free in readdir
+[#4582](https://github.com/gluster/glusterfs/pull/4582) shd/symlink: soft links entry recreate fails
+[#4583](https://github.com/gluster/glusterfs/pull/4583) extras: use "grep -E" instead of egrep to resolve warning