Advance Tier Adapted

[Hoseong-Seo]

Issue # (if applicable)

Reason for this change It is implementation of "ADVANCED TIER" of ECS SaaS reference version 2.

Description of changes

• Added Advance Tier and created eni trunking which is applied to ec2 using cluster(ADVANCED, PREMIUM).
• folder structure is changed following by coding convention

Description of how you validated changes

• After installation, create advanced tier tenant and check all functions.
• And other tenant tests are needed for any side effects check.

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