Hcl Validate Show Config Path Env Var

Fixed the deprecated environment variables for hcl validate

TG_HCLVALIDATE_STRICT_VALIDATE, the deprecated name for --strict, also turned on --show-config-path. --strict only takes effect alongside --inputs, and --show-config-path cannot be combined with --inputs. With that variable set, terragrunt hcl validate --inputs failed with specifying both -show-config-path and -inputs is invalid.

TG_HCLVALIDATE_SHOW_CONFIG_PATH, the deprecated name for --show-config-path, was not recognized at all.

TG_HCLVALIDATE_STRICT_VALIDATE now sets only --strict, and TG_HCLVALIDATE_SHOW_CONFIG_PATH sets --show-config-path. TG_STRICT_VALIDATE, TERRAGRUNT_STRICT_VALIDATE, and TERRAGRUNT_HCLVALIDATE_SHOW_CONFIG_PATH are unchanged.