[MM-36472] Fix inconsistencies in Roles columns (#18390)

* Fix inconsistencies in Roles columns

* Add new migrations

db/migrations/postgres/000003_alter_team_members_roles.down.sql

@@ -0,0 +1,16 @@
+DO $$
+<<modify_column_type_if_type_is_different>>
+DECLARE
+    col_exist_and_type_different boolean := false;
+BEGIN
+    SELECT count(*) != 0 INTO col_exist_and_type_different
+    FROM information_schema.columns
+    WHERE table_name = 'teammembers'
+    AND column_name = 'roles'
+    AND data_type = 'character varying'
+    AND NOT character_maximum_length = 64;
+
+    IF col_exist_and_type_different THEN
+        ALTER TABLE teammembers ALTER COLUMN roles TYPE varchar(64);
+    END IF;
+END modify_column_type_if_type_is_different $$

db/migrations/postgres/000003_alter_team_members_roles.up.sql

@@ -0,0 +1,16 @@
+DO $$
+<<modify_column_type_if_type_is_different>>
+DECLARE
+    col_exist_and_type_different boolean := false;
+BEGIN
+    SELECT count(*) != 0 INTO col_exist_and_type_different
+    FROM information_schema.columns
+    WHERE table_name = 'teammembers'
+    AND column_name = 'roles'
+    AND data_type = 'character varying'
+    AND NOT character_maximum_length = 256;
+
+    IF col_exist_and_type_different THEN
+        ALTER TABLE teammembers ALTER COLUMN roles TYPE varchar(256);
+    END IF;
+END modify_column_type_if_type_is_different $$