feat: enable maintainers processing for all git, github, and gitlab repos instead of github only (CM-773) (#3594)

Author: mbani01

backend/src/database/migrations/U1762938833__migrateMaintainersRepoReferenceToGitRepositories.sql

@@ -0,0 +1,11 @@
+-- Migration to remove the foreign key constraint from maintainersInternal.repoId to githubRepos.id
+-- This removes the dependency on githubRepos table and creates the new reference to git.repositories table
+
+ALTER TABLE "maintainersInternal"
+DROP CONSTRAINT IF EXISTS "maintainersInternal_repoId_fkey";
+
+ALTER TABLE "maintainersInternal"
+ADD CONSTRAINT "maintainersInternal_repoId_fkey"
+FOREIGN KEY ("repoId")
+REFERENCES git.repositories(id)
+ON DELETE CASCADE;