feat: add awsiamrds db auth driver (#12566)

enterprise/cli/testdata/coder_server_--help.golden

@@ -45,6 +45,9 @@ OPTIONS:
           Separate multiple experiments with commas, or enter '*' to opt-in to
           all available experiments.
 
+      --postgres-auth password|awsiamrds, $CODER_PG_AUTH (default: password)
+          Type of auth to use when connecting to postgres.
+
       --postgres-url string, $CODER_PG_CONNECTION_URL
           URL of a PostgreSQL database. If empty, PostgreSQL binaries will be
           downloaded from Maven (https://repo1.maven.org/maven2) and store all

enterprise/cli/testdata/coder_server_create-admin-user_--help.golden

@@ -7,6 +7,9 @@ USAGE:
   it to every organization.
 
 OPTIONS:
+      --postgres-connection-auth password|awsiamrds, $CODER_PG_CONNECTION_AUTH (default: password)
+          Type of auth to use when connecting to postgres.
+
       --email string, $CODER_EMAIL
           The email of the new user. If not specified, you will be prompted via
           stdin.

enterprise/cli/testdata/coder_server_dbcrypt_decrypt_--help.golden

@@ -6,6 +6,9 @@ USAGE:
   Decrypt a previously encrypted database.
 
 OPTIONS:
+      --postgres-connection-auth password|awsiamrds, $CODER_PG_CONNECTION_AUTH (default: password)
+          Type of auth to use when connecting to postgres.
+
       --keys string-array, $CODER_EXTERNAL_TOKEN_ENCRYPTION_DECRYPT_KEYS
           Keys required to decrypt existing data. Must be a comma-separated list
           of base64-encoded keys.

enterprise/cli/testdata/coder_server_dbcrypt_delete_--help.golden

@@ -8,6 +8,9 @@ USAGE:
   Aliases: rm
 
 OPTIONS:
+      --postgres-connection-auth password|awsiamrds, $CODER_PG_CONNECTION_AUTH (default: password)
+          Type of auth to use when connecting to postgres.
+
       --postgres-url string, $CODER_EXTERNAL_TOKEN_ENCRYPTION_POSTGRES_URL
           The connection URL for the Postgres database.
 

enterprise/cli/testdata/coder_server_dbcrypt_rotate_--help.golden

@@ -6,6 +6,9 @@ USAGE:
   Rotate database encryption keys.
 
 OPTIONS:
+      --postgres-connection-auth password|awsiamrds, $CODER_PG_CONNECTION_AUTH (default: password)
+          Type of auth to use when connecting to postgres.
+
       --new-key string, $CODER_EXTERNAL_TOKEN_ENCRYPTION_ENCRYPT_NEW_KEY
           The new external token encryption key. Must be base64-encoded.