Fix ecmp hash polarization by enable hash seed/offset config on T1 an…

…d upgrade xgs SAI to 8.4.35.0 (sonic-net#17505)

Why I did it
To fix ecmp hash polarization issue.

Work item tracking
Microsoft ADO (number only): 26085143
How I did it
Add sai_hash_seed_config_hash_offset_enable=1 in all config.bcm that Broadcom T1 uses.

HardwareSku
Force10-S6100-T1
Force10-S6100-ITPAC-T1
Force10-S6100
Celestica-DX010-C32
Arista-7260CX3-C64
Arista-7060CX-32S-Q32
Arista-7060CX-32S-C32-T1
Arista-7060CX-32S-C32
Arista-7050QX32S-Q32
Arista-7050QX-32S-S4Q31
Arista-7050-QX32
Arista-7050-QX-32SInclude Broadcom's fix by upgrading xgs SAI version to 8.4.35.0.
8.4.35.0: [CSP 00012324019] back-porting SONIC-75006 to SAI8.4
8.4.34.0:
[CSP 00012318293] back-porting SONIC-81534 to SAI8.4;
ECMP LB traffic polarization, configure hash_offset along with hash_seed attr
Run qual with only xgs SAI version upgraded to 8.4.35.0:
on TH2: https://elastictest.org/scheduler/testplan/6579b36ccfacd86e78e3e885?leftSideViewMode=detail&prop=status&order=ascending
on TH: https://elastictest.org/scheduler/testplan/657a75f8c1d3b51fc1d585b4?leftSideViewMode=detail&prop=status&order=ascending

How to verify it
use tests/ecmp/test_ecmp_sai_value.py to verify.

device/arista/x86_64-arista_7050_qx32/Arista-7050-QX32/sai.profile.j2

@@ -0,0 +1,14 @@
+{# Get sai.profile based on switch_role #}
+{%- if DEVICE_METADATA is defined -%}
+{%-     set switch_role = DEVICE_METADATA['localhost']['type'] -%}
+{%-     if 'leafrouter' in switch_role.lower() -%}
+{%         set sai_profile_contents = 'SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/td2-a7050-qx32-32x40G-t1.config.bcm' -%}
+{%-     else %}
+{%-         set sai_profile_contents = 'SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/td2-a7050-qx32-32x40G-t0.config.bcm' -%}
+{%-     endif %}
+{%- else %}
+{%-     set sai_profile_contents = 'SAI_INIT_CONFIG_FILE=/usr/share/sonic/hwsku/td2-a7050-qx32-32x40G-t0.config.bcm' -%}
+{%- endif %}
+{# Write the contents of sai_ profile_filename to sai.profile file #}
+{{ sai_profile_contents }}
+SAI_NUM_ECMP_MEMBERS=32