Decouple running deprecated migrations and adding package warnings fr…

…om readZarfYAML

The goal here is separation of concerns

src/pkg/packager/deploy.go

@@ -48,6 +48,8 @@ func (p *Packager) Deploy() (err error) {
 		return err
 	}
 
+	p.runMigrations()
+
 	if err := p.validateLastNonBreakingVersion(); err != nil {
 		return err
 	}

src/pkg/packager/migrate.go

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: 2021-Present The Zarf Authors
+
+// Package packager contains functions for interacting with, managing and deploying Zarf packages.
+package packager
+
+import "github.com/defenseunicorns/zarf/src/pkg/packager/deprecated"
+
+func (p *Packager) runMigrations() {
+	var warnings []string
+
+	if len(p.cfg.Pkg.Build.Migrations) > 0 {
+		for idx, component := range p.cfg.Pkg.Components {
+			// Handle component configuration deprecations
+			p.cfg.Pkg.Components[idx], warnings = deprecated.MigrateComponent(p.cfg.Pkg.Build, component)
+			p.warnings = append(p.warnings, warnings...)
+		}
+	}
+}