worker: Add search job implementation to worker client

This is similar to the depsolve job, and it shares the solver (which
supports locking, as does DNF itself). This will allow searching for
specific package names, names with globs, or names as substrings of
other names using * as the wildcard.

Related: RHEL-60136

cmd/osbuild-worker/main.go

@@ -427,7 +427,7 @@ var run = func() {
 		}
 	}
 
-	// depsolve jobs can be done during other jobs
+	// depsolve and search jobs can be done during other jobs
 	depsolveCtx, depsolveCtxCancel := context.WithCancel(context.Background())
 	solver := dnfjson.NewBaseSolver(rpmmd_cache)
 	if config.DNFJson != "" {
@@ -440,6 +440,10 @@ var run = func() {
 				Solver:               solver,
 				RepositoryMTLSConfig: repositoryMTLSConfig,
 			},
+			worker.JobTypeSearchPackages: &SearchPackagesJobImpl{
+				Solver:               solver,
+				RepositoryMTLSConfig: repositoryMTLSConfig,
+			},
 		}
 		acceptedJobTypes := []string{}
 		for jt := range jobImpls {