feat: Added default tags functionality

[JorgeReus]

Default Tags functionality added into the missing tags rule

I've added the functionality and tests to allow using default tags and not come across into errors. I work with a lot of repos in which we comply with the tagging standard using default_tags.

This functionality will help us to detect uncompliant resources before we deploy them (we use cloud custodian)

Instead of creating an extra rule, I updated the existing one, this due to the keep only one rule regarding missing tags and allow others to use this feature without adding another rule to the tflint config.

LMK if any changes need to be made

fixes: #192

[wata727]

Thank you for your contribution.
Left some comments. Feel free to ask questions.

[nitrocode]

Thank you @wata727 for reviewing this! And thank you @JorgeReus for adding this. Please see the comments above. I would love to see this in the next version of this ruleset as many people will start using default_tags now that the feature is going to be heavily adopted thanks to the aws 5.x provider changes. 😄

[JorgeReus]

Hey there!

Thanks for the review @wata727, didn't had much time last week to fix the PR, but hopefully I will this one.

@nitrocode Sure! Will do my best.

[JorgeReus]

Done fixing the comments, thanks @wata727!

[JorgeReus]

Done for the second round of checks! Still familiarizing with the runner API, thanks!

BTW, I downloaded the rules/models/aws-sdk-go submodule and runned go generate, LMK if I need to rebase to erase those files from the PR, was trying to test locally with make install, but tflint was nagging about to finding the rule.

[wata727]

LMK if I need to rebase to erase those files from the PR

Yes, we don't want to include irrelevant changes in this PR, so please rebase or clean up the diff.

[JorgeReus]

LMK if I need to rebase to erase those files from the PR

Yes, we don't want to include irrelevant changes in this PR, so please rebase or clean up the diff.

Done with the git wizardry, and thanks again for the review!

LMK if more changes need to be made!

[wata727]

Nice 👍

[nitrocode]

Awesome! Nice work all!

[nitrocode]

Hmm this test fails after this PR merged https://github.com/terraform-linters/tflint-ruleset-aws/actions/runs/5256902432/jobs/9498886637

Generating rule for `aws_launch_configuration.spot_price`
panic: `aws_launch_configuration.vpc_classic_link_security_groups` not found in the Terraform schema

goroutine 1 [running]:
main.fetchSchema({0xc0001ecf18, 0x18}, {0xc0001ea960, 0x20}, 0xc00373fd20?, {0x66d220?})
	/home/runner/work/tflint-ruleset-aws/tflint-ruleset-aws/rules/models/generator/main.go:109 +0x3e8
main.main()
	/home/runner/work/tflint-ruleset-aws/tflint-ruleset-aws/rules/models/generator/main.go:81 +0x7c8
exit status 2

Unsure if it's related to this PR or something else in the code base.

Edit: nvm, it looks like it failed in the last 3 PR merges - this one and 2 dependabot PRs #498 #497

https://github.com/terraform-linters/tflint-ruleset-aws/commits/master