Feat: update data source to add routes to default route table of vpc

[h1manshu98]

What

• Remove aws_route_table data source and add aws_route_tables data source to include DEFAULT Route-Table as well.

Why

• If any of the subnet is using DEFAULT route table of the VPC then our current terraform code throws below error for such subnets

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│ Error: query returned no results. Please change your search criteria and try again
│
│   with module.vpc_peering.data.aws_route_table.acceptor[20],
│   on .terraform/modules/vpc_peering/main.tf line 120, in data "aws_route_table" "acceptor":
│  120: data "aws_route_table" "acceptor" {
│