Roll back ceos image version since it's causing bgp failure (#19180)

What is the motivation for this PR?
Previously we updated ceos image version to 4.32.5M to meet the needs of test server OS version upgrade to Ubuntu 24, but it's causing bgp gr failure and the issue may not be able to have a quick fix.

How did you do it?
Roll back ceos image version to 4.29.3M.

Author: xwjiang-ms

ansible/group_vars/vm_host/ceos.yml

@@ -1,11 +1,11 @@
-ceos_image_filename: cEOS64-lab-4.32.5M.tar
-ceos_image_orig: ceosimage:4.32.5M
-ceos_image: ceosimage:4.32.5M-1
+ceos_image_filename: cEOS64-lab-4.29.3M.tar
+ceos_image_orig: ceosimage:4.29.3M
+ceos_image: ceosimage:4.29.3M-1
 # Please update ceos_image_url to the actual URL of the cEOS image file in your environment. If the cEOS image file
 # is not available on test server, the cEOS image file will be downloaded from this URL.
 # The ceos_image_url can be a string as single URL or a list of strings as multiple URLs. If it is a list, the code
 # logic will automatically try each URL in the list
 ceos_image_url:
-  - "http://example1.com/cEOS64-lab-4.32.5M.tar"
-  - "http://example2.com/cEOS64-lab-4.32.5M.tar"
+  - "http://example1.com/cEOS64-lab-4.29.3M.tar"
+  - "http://example2.com/cEOS64-lab-4.29.3M.tar"
 skip_ceos_image_downloading: false

tests/common/plugins/conditional_mark/tests_mark_conditions.yaml

@@ -134,11 +134,9 @@ bgp/test_bgp_bbr.py:
 
 bgp/test_bgp_gr_helper.py:
   skip:
-    reason: 'bgp graceful restarted is not a supported feature for T2 and skip in KVM for failing with new cEOS image'
-    conditions_logical_operator: or
+    reason: 'bgp graceful restarted is not a supported feature for T2'
     conditions:
       - "'t2' in topo_name"
-      - "asic_type in ['vs'] and https://github.com/sonic-net/sonic-mgmt/issues/18788"
 
 bgp/test_bgp_multipath_relax.py:
   skip: