Add container.FilterSlice function (#30339)

Many places have the following logic:
```go
func (jobs ActionJobList) GetRunIDs() []int64 {
	ids := make(container.Set[int64], len(jobs))
	for _, j := range jobs {
		if j.RunID == 0 {
			continue
		}
		ids.Add(j.RunID)
	}
	return ids.Values()
}
```

this introduces a `container.FilterMapUnique` function, which reduces
the code above to:
```go
func (jobs ActionJobList) GetRunIDs() []int64 {
	return container.FilterMapUnique(jobs, func(j *ActionRunJob) (int64, bool) {
		return j.RunID, j.RunID != 0
	})
}
```

models/actions/run_job_list.go

@@ -16,14 +16,9 @@ import (
 type ActionJobList []*ActionRunJob
 
 func (jobs ActionJobList) GetRunIDs() []int64 {
-	ids := make(container.Set[int64], len(jobs))
-	for _, j := range jobs {
-		if j.RunID == 0 {
-			continue
-		}
-		ids.Add(j.RunID)
-	}
-	return ids.Values()
+	return container.FilterSlice(jobs, func(j *ActionRunJob) (int64, bool) {
+		return j.RunID, j.RunID != 0
+	})
 }
 
 func (jobs ActionJobList) LoadRuns(ctx context.Context, withRepo bool) error {

models/actions/run_list.go

@@ -19,19 +19,15 @@ type RunList []*ActionRun
 
 // GetUserIDs returns a slice of user's id
 func (runs RunList) GetUserIDs() []int64 {
-	ids := make(container.Set[int64], len(runs))
-	for _, run := range runs {
-		ids.Add(run.TriggerUserID)
-	}
-	return ids.Values()
+	return container.FilterSlice(runs, func(run *ActionRun) (int64, bool) {
+		return run.TriggerUserID, true
+	})
 }
 
 func (runs RunList) GetRepoIDs() []int64 {
-	ids := make(container.Set[int64], len(runs))
-	for _, run := range runs {
-		ids.Add(run.RepoID)
-	}
-	return ids.Values()
+	return container.FilterSlice(runs, func(run *ActionRun) (int64, bool) {
+		return run.RepoID, true
+	})
 }
 
 func (runs RunList) LoadTriggerUser(ctx context.Context) error {

models/actions/runner_list.go

@@ -16,14 +16,9 @@ type RunnerList []*ActionRunner
 
 // GetUserIDs returns a slice of user's id
 func (runners RunnerList) GetUserIDs() []int64 {
-	ids := make(container.Set[int64], len(runners))
-	for _, runner := range runners {
-		if runner.OwnerID == 0 {
-			continue
-		}
-		ids.Add(runner.OwnerID)
-	}
-	return ids.Values()
+	return container.FilterSlice(runners, func(runner *ActionRunner) (int64, bool) {
+		return runner.OwnerID, runner.OwnerID != 0
+	})
 }
 
 func (runners RunnerList) LoadOwners(ctx context.Context) error {

models/actions/schedule_list.go

@@ -18,19 +18,15 @@ type ScheduleList []*ActionSchedule
 
 // GetUserIDs returns a slice of user's id
 func (schedules ScheduleList) GetUserIDs() []int64 {
-	ids := make(container.Set[int64], len(schedules))
-	for _, schedule := range schedules {
-		ids.Add(schedule.TriggerUserID)
-	}
-	return ids.Values()
+	return container.FilterSlice(schedules, func(schedule *ActionSchedule) (int64, bool) {
+		return schedule.TriggerUserID, true
+	})
 }
 
 func (schedules ScheduleList) GetRepoIDs() []int64 {
-	ids := make(container.Set[int64], len(schedules))
-	for _, schedule := range schedules {
-		ids.Add(schedule.RepoID)
-	}
-	return ids.Values()
+	return container.FilterSlice(schedules, func(schedule *ActionSchedule) (int64, bool) {
+		return schedule.RepoID, true
+	})
 }
 
 func (schedules ScheduleList) LoadTriggerUser(ctx context.Context) error {

models/actions/schedule_spec_list.go

@@ -16,11 +16,9 @@ import (
 type SpecList []*ActionScheduleSpec
 
 func (specs SpecList) GetScheduleIDs() []int64 {
-	ids := make(container.Set[int64], len(specs))
-	for _, spec := range specs {
-		ids.Add(spec.ScheduleID)
-	}
-	return ids.Values()
+	return container.FilterSlice(specs, func(spec *ActionScheduleSpec) (int64, bool) {
+		return spec.ScheduleID, true
+	})
 }
 
 func (specs SpecList) LoadSchedules(ctx context.Context) error {
@@ -46,11 +44,9 @@ func (specs SpecList) LoadSchedules(ctx context.Context) error {
 }
 
 func (specs SpecList) GetRepoIDs() []int64 {
-	ids := make(container.Set[int64], len(specs))
-	for _, spec := range specs {
-		ids.Add(spec.RepoID)
-	}
-	return ids.Values()
+	return container.FilterSlice(specs, func(spec *ActionScheduleSpec) (int64, bool) {
+		return spec.RepoID, true
+	})
 }
 
 func (specs SpecList) LoadRepos(ctx context.Context) error {

models/actions/task_list.go

@@ -16,14 +16,9 @@ import (
 type TaskList []*ActionTask
 
 func (tasks TaskList) GetJobIDs() []int64 {
-	ids := make(container.Set[int64], len(tasks))
-	for _, t := range tasks {
-		if t.JobID == 0 {
-			continue
-		}
-		ids.Add(t.JobID)
-	}
-	return ids.Values()
+	return container.FilterSlice(tasks, func(t *ActionTask) (int64, bool) {
+		return t.JobID, t.JobID != 0
+	})
 }
 
 func (tasks TaskList) LoadJobs(ctx context.Context) error {