Support TF_LOG=trace log output

[joshi4]

Example logs.

2025-08-19T20:42:24.315-0700 [INFO]  Terraform version: 1.12.2
2025-08-19T20:42:24.315-0700 [DEBUG] using github.com/hashicorp/go-tfe v1.74.1
2025-08-19T20:42:24.315-0700 [DEBUG] using github.com/hashicorp/hcl/v2 v2.23.1-0.20250203194505-ba0759438da2
2025-08-19T20:42:24.315-0700 [DEBUG] using github.com/hashicorp/terraform-svchost v0.1.1
2025-08-19T20:42:24.315-0700 [DEBUG] using github.com/zclconf/go-cty v1.16.2
2025-08-19T20:42:24.315-0700 [INFO]  Go runtime version: go1.24.2
2025-08-19T20:42:24.315-0700 [INFO]  CLI args: []string{"terraform", "providers"}
2025-08-19T20:42:24.315-0700 [TRACE] Stdout is a terminal of width 83
2025-08-19T20:42:24.315-0700 [TRACE] Stderr is a terminal of width 83
2025-08-19T20:42:24.315-0700 [TRACE] Stdin is a terminal
2025-08-19T20:42:24.316-0700 [DEBUG] Attempting to open CLI config file: /Users/shantanu/.terraformrc
2025-08-19T20:42:24.316-0700 [DEBUG] File doesn't exist, but doesn't need to. Ignoring.
2025-08-19T20:42:24.316-0700 [DEBUG] ignoring non-existing provider search directory terraform.d/plugins
2025-08-19T20:42:24.316-0700 [DEBUG] ignoring non-existing provider search directory /Users/shantanu/.terraform.d/plugins
2025-08-19T20:42:24.316-0700 [DEBUG] ignoring non-existing provider search directory /Users/shantanu/Library/Application Support/io.terraform/plugins
2025-08-19T20:42:24.316-0700 [DEBUG] ignoring non-existing provider search directory /Library/Application Support/io.terraform/plugins
2025-08-19T20:42:24.317-0700 [INFO]  CLI command args: []string{"providers"}