[Mellanox] Add support to VXLAN src port range setting via SAI profile for specific SKUs

[ayurkiv-nvda]

Why I did it

Enable VXLAN src port range configuration via SAI profile for the following HWSKU:
SN3800:
• Mellanox-SN3800-D28C50
• Mellanox-SN3800-C64
SN2700:
• Mellanox-SN2700-D48C8

How I did it

Added SAI_VXLAN_SRCPORT_RANGE_ENABLE=1 configuration to appropriate sai.profile

How to verify it

py.test vxlan/test_vnet_vxlan.py --inventory "../ansible/inventory, ../ansible/veos" --host-pattern (testbed)-t0 --module-path                ../ansible/library/ --testbed (testbed)-t0 --testbed_file ../ansible/testbed.csv --allow_recover  --assert plain --log-cli-level info --show-capture=no -ra --showlocals --disable_loganalyzer --skip_sanity --upper_bound_udp_port 65535  --lower_bound_udp_port 64128

Which release branch to backport (provide reason below if selected)

• 201811
• 201911
• 202006
• 202012

Description for the changelog

should be merged after this PRs:

1. [Mellanox] Update SAI version 1.18.3.2 [Mellanox] Update SAI version 1.18.3.2 #7428
2. [Mellanox] [201911] Update SAI version 1.18.3.1 [Mellanox] [201911] Update SAI version 1.18.3.1 #7426

A picture of a cute animal (not mandatory but encouraged)

[liat-grozovik]

@ayurkiv-nvda please check if this can be cherry picked cleanly to 202012 and 201911. If not, please create a PR against the branch and add reference to this one.

[liat-grozovik]

@prsunny the reason this PR is in draft as SAI need to be updated for each branch separately. will change it once it is merged.

[liat-grozovik]

/azp run

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[liat-grozovik]

/azp run

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