[202012] [cherry-pick] Generate switch level dscp_to_tc_map entry from qos_config template#11132

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bingwang-ms merged 5 commits intosonic-net:202012from

bingwang-ms:add_global_in_port_qos_map_202012

Jun 17, 2022

Commits on Jun 14, 2022

Generate switch level dscp_to_tc_map
bingwang-ms
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Commits on Jun 15, 2022

Address comments
bingwang-ms
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Commits on Jun 16, 2022

Commits on Jun 17, 2022

Fix 7800 sample output
bingwang-ms
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