docs: Correct flag and environment variable names for AWS OIDC authentication (#4785)

Fixes #4774

Author: carchi1a

docs-starlight/src/content/docs/03-features/09-authentication.md

@@ -40,16 +40,16 @@ To avoid these frustrating trade-offs, you can configure Terragrunt to assume an
 
 ## Configuring Terragrunt to assume an IAM role
 
-To tell Terragrunt to assume an IAM role, just set the [`--iam-role`](/docs/reference/cli/commands/run#iam-role) command line argument:
+To tell Terragrunt to assume an IAM role, just set the [`--iam-assume-role`](/docs/reference/cli/commands/run#iam-assume-role) command line argument:
 
 ```bash
-terragrunt apply --iam-role "arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME"
+terragrunt apply --iam-assume-role "arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME"
 ```
 
-Alternatively, you can set the `TG_IAM_ROLE` environment variable:
+Alternatively, you can set the `TG_IAM_ASSUME_ROLE` environment variable:
 
 ```bash
-export TG_IAM_ROLE="arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME"
+export TG_IAM_ASSUME_ROLE="arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME"
 terragrunt apply
 ```
 
@@ -67,23 +67,23 @@ Terragrunt will call the `sts assume-role` API on your behalf and expose the cre
 
 ## Leveraging OIDC role assumption
 
-In addition, you can combine the `--iam-role` flag with the [`--iam-web-identity-token`](/docs/reference/cli/commands/run#iam-web-identity-token) to use the `AssumeRoleWithWebIdentity` API instead of the `AssumeRole` API.
+In addition, you can combine the `--iam-assume-role` flag with the [`--iam-assume-role-web-identity-token`](/docs/reference/cli/commands/run#iam-assume-role-web-identity-token) to use the `AssumeRoleWithWebIdentity` API instead of the `AssumeRole` API.
 
 This is especially convenient in the context of CI/CD pipelines, as it's generally a best practice to assume roles there via OIDC.
 
-Configuring OIDC role assumption largely works like the `--iam-role` flag, with the addition of the `--iam-web-identity-token` flag. One special aspect of the `--iam-web-identity-token` flag is that it can use both a token, and the path to a file containing the token.
+Configuring OIDC role assumption largely works like the `--iam-assume-role` flag, with the addition of the `--iam-assume-role-web-identity-token` flag. One special aspect of the `--iam-assume-role-web-identity-token` flag is that it can use both a token, and the path to a file containing the token.
 
 As a command line argument:
 
 ```bash
-terragrunt apply --iam-role "arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME" --iam-web-identity-token "$TOKEN"
+terragrunt apply --iam-assume-role "arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME" --iam-assume-role-web-identity-token "$TOKEN"
 ```
 
 As environment variables:
 
 ```bash
-export TG_IAM_ROLE="arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME"
-export TG_IAM_WEB_IDENTITY_TOKEN="$TOKEN"
+export TG_IAM_ASSUME_ROLE="arn:aws:iam::ACCOUNT_ID:role/ROLE_NAME"
+export TG_IAM_ASSUME_ROLE_WEB_IDENTITY_TOKEN="$TOKEN"
 terragrunt apply
 ```
 

docs-starlight/src/content/docs/04-reference/01-hcl/03-attributes.mdx

@@ -177,7 +177,7 @@ explicitly redefined in the current's module `terragrunt.hcl` file.
 
 The `iam_role` attribute can be used to specify an IAM role that Terragrunt should assume before invoking OpenTofu/Terraform.
 
-The precedence is as follows: `--iam-role` command line option → `TG_IAM_ASSUME_ROLE` env variable →
+The precedence is as follows: `--iam-assume-role` command line option → `TG_IAM_ASSUME_ROLE` env variable →
 `iam_role` attribute of the `terragrunt.hcl` file in the module directory → `iam_role` attribute of the included
 `terragrunt.hcl`.
 
@@ -222,7 +222,7 @@ The precedence is as follows: `--iam-assume-role-session-name` command line opti
 
 The `iam_web_identity_token` attribute can be used along with `iam_role` to assume a role using AssumeRoleWithWebIdentity. `iam_web_identity_token` can be set to either the token value (typically using `get_env()`), or the path to a file on disk.
 
-The precedence is as follows: `--iam-web-identity-token` command line option → `TG_IAM_ASSUME_ROLE_WEB_IDENTITY_TOKEN` env variable →
+The precedence is as follows: `--iam-assume-role-web-identity-token` command line option → `TG_IAM_ASSUME_ROLE_WEB_IDENTITY_TOKEN` env variable →
 `iam_web_identity_token` attribute of the `terragrunt.hcl` file in the module directory → `iam_web_identity_token` attribute of the included
 `terragrunt.hcl`.
 

docs-starlight/src/data/flags/use-partial-parse-config-cache.mdx

@@ -1,6 +1,6 @@
 ---
 name: use-partial-parse-config-cache
-description: Enables caching of includes during partial parsing operations. Will also be used for the --iam-role option if provided.
+description: Enables caching of includes during partial parsing operations. Will also be used for the --iam-assume-role option if provided.
 type: bool
 env:
   - TG_USE_PARTIAL_PARSE_CONFIG_CACHE