[202412][Broadcom] Move xgs SAI to SAI_13.2.1_GA (sonic-net#1530)

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#### Why I did it
[Broadcom] Move xgs SAI to SAI_13.2.1_GA
This is a cherry-pick of
sonic-net#23739

##### Work item tracking
- Microsoft ADO **(number only)**: 34471391

Signed-off-by: zitingguo-ms <zitingguo@microsoft.com>

Signed-off-by: zitingguo-ms <zitingguo@microsoft.com>

Author: Gfrom2016

platform/broadcom/sai.mk

@@ -1,6 +1,6 @@
-LIBSAIBCM_XGS_VERSION = 13.2.1.2
+LIBSAIBCM_XGS_VERSION = 13.2.1.1
 LIBSAIBCM_DNX_VERSION = 12.3.3.2
-LIBSAIBCM_XGS_BRANCH_NAME = SAI_13.2.1_EA
+LIBSAIBCM_XGS_BRANCH_NAME = SAI_13.2.1_GA
 LIBSAIBCM_DNX_BRANCH_NAME = SAI_12.3.0_GA
 LIBSAIBCM_XGS_URL_PREFIX = "https://packages.trafficmanager.net/public/sai/sai-broadcom/$(LIBSAIBCM_XGS_BRANCH_NAME)/$(LIBSAIBCM_XGS_VERSION)/xgs"
 LIBSAIBCM_DNX_URL_PREFIX = "https://packages.trafficmanager.net/public/sai/sai-broadcom/$(LIBSAIBCM_DNX_BRANCH_NAME)/$(LIBSAIBCM_DNX_VERSION)/dnx"