[202205] Update BRCM SAI version to 7.1.32.4 (#13452)

Why I did it
To pick up the below DNX fixes:

CS00012275689: DSCP->TC and TC->QUEUE mappings are not happening for packets received on LAG ports (SONIC-69367)
CS00012277618: Crash in _brcm_sai_dnx_irpp_port_core_get (SONIC-70001)
How I did it
Updated SAI branch with the above fixes

How to verify it
Ran basic sonic-mgmt tests with the SAI debian on XGS and DNX platforms

platform/broadcom/sai.mk

@@ -1,5 +1,5 @@
-LIBSAIBCM_XGS_VERSION = 7.1.31.4
-LIBSAIBCM_DNX_VERSION = 7.1.31.4
+LIBSAIBCM_XGS_VERSION = 7.1.32.4
+LIBSAIBCM_DNX_VERSION = 7.1.32.4
 LIBSAIBCM_BRANCH_NAME = REL_7.0_202205
 LIBSAIBCM_XGS_URL_PREFIX = "https://sonicstorage.blob.core.windows.net/public/sai/bcmsai/$(LIBSAIBCM_BRANCH_NAME)/$(LIBSAIBCM_XGS_VERSION)"
 LIBSAIBCM_DNX_URL_PREFIX = "https://sonicstorage.blob.core.windows.net/public/sai/bcmsai/$(LIBSAIBCM_BRANCH_NAME)/$(LIBSAIBCM_DNX_VERSION)"