[EC-318] Migrated pipelines & terraform code from io-infra

[mamu0]

List of Changes

With this PR, the entire Terraform infrastructure, previously located in the io-infra repository, has been moved to the infra/prod folder.
Additionally, two GitHub Actions pipelines have been created to manage the CI/CD flow.
One pipeline executes the Terraform plan and is triggered when a PR is created, and the other pipeline performs the Terraform apply and is triggered when the PR is merged.
Removed old github runner configuration.
Removed all identities created inside the .identity folder.

Motivation and Context

This PR completes the migration plan for the pipelines within io-infra.
By doing so, the code specific to io-sign has been moved from io-infra to its dedicated repository.
This ensures that all code is maintained in the same place as the rest of the project.

How Has This Been Tested?

Screenshots (if appropriate):

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 884d7a5

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[Krusty93]

I suggest few changes I detailed in comments

[github-actions]

📖 Terraform Plan ('infra/resources/prod') - success

Terraform Plan

No changes. Your infrastructure matches the configuration.

Terraform has compared your real infrastructure against your configuration
and found no differences, so no changes are needed.

Warning: Argument is deprecated

  with module.cosmosdb_account.azurerm_cosmosdb_account.this,
  on .terraform/modules/cosmosdb_account/cosmosdb_account/main.tf line 7, in resource "azurerm_cosmosdb_account" "this":
   7:   enable_free_tier          = var.enable_free_tier

This property has been superseded by `free_tier_enabled` and will be removed
in v4.0 of the AzureRM Provider

(and 23 more similar warnings elsewhere)

Warning: Deprecated attribute

  on .terraform/modules/cosmosdb_account/cosmosdb_account/output.tf line 54, in output "connection_strings":
  54:   value     = azurerm_cosmosdb_account.this.connection_strings

The attribute "connection_strings" is deprecated. Refer to the provider
documentation for details.

(and one more similar warning elsewhere)