[mirror] erspan ipv6 underlay (see PR #1817)

[mramezani95]

Why I did it Unlock erspan capability on td3 and beyond that supports erspan ipv6 encap.

What I did

How I verified it

1. Extend test_MirrorAddSetRemove, test_MirrorToVlanAddRemove, test_MirrorToLagAddRemove, test_MirrorDestMoveVlan, test_MirrorDestMoveLag to vs test erspan ipv6 encap
2. On td3

Details if related Used brcm sai 4.3.3 that interacts with sdk 6.5.21

Notes Copied from PR #1817

[linux-foundation-easycla[bot]]

The committers listed above are authorized under a signed CLA.

• :white_check_mark: login: mramezani95 (343f21e881713bdc30b762f8d1ed0f6560242b8b, f56a549f6ce3abd59c1b010a556e0a44e4ba59d0, 0c74e0dddb7b60ce83092555e57ecdf476b550cd, 483e651c670d59798950ac8fd3ef07d77fdd1d6f, 45323f4b9c48a9032a1f86de0eb10d3f0b695280, 9f2222231e0bd40deaf263bb8fd94c31dc5a3f96, f45040aa514476711c516888ff68d91241bc16aa, f955a78fd009d9e64b905ce0f2dc1f68c1a3a7ca, 2781d66a76e3ce720d311a4c0f0f1230cdab2017, f09153fe4d9b128ba4a48e763c086a98351e5c44, 219647b6faf88e2102cc53d84f34c79e53c87ebe)
• :white_check_mark: login: prsunny / name: Prince Sunny (5301600c5d022121eb4cd2703048a784bb5c264a, aafae7b00db1d8da678d853bb6724612580fbc38)

[prsunny]

@mramezani95 , can you please check the VS test failures?

[mramezani95]

@prsunny This test fails: test_duplicate_eni_route_group.

[prsunny]

sonic-mgmt tests - https://github.com/sonic-net/sonic-mgmt/pull/16752