Remove github.com/pkg/errors with appropriate replacements (#3172)

* errors.Wrap* removal

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* remove errors.Errorf

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Remove remaining calls

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Few more errors

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

* Fix golint errors

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

---------

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>

pkg/fission-cli/cmd/function/get.go

@@ -17,9 +17,9 @@ limitations under the License.
 package function
 
 import (
+	"fmt"
 	"os"
 
-	"github.com/pkg/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 
 	"github.com/fission/fission/pkg/fission-cli/cliwrapper/cli"
@@ -38,16 +38,16 @@ func Get(input cli.Input) error {
 func (opts *GetSubCommand) do(input cli.Input) error {
 	_, namespace, err := opts.GetResourceNamespace(input, flagkey.NamespaceFunction)
 	if err != nil {
-		return errors.Wrap(err, "error in get function ")
+		return fmt.Errorf("error in get function : %w", err)
 	}
 	fn, err := opts.Client().FissionClientSet.CoreV1().Functions(namespace).Get(input.Context(), input.String(flagkey.FnName), metav1.GetOptions{})
 	if err != nil {
-		return errors.Wrap(err, "error getting function")
+		return fmt.Errorf("error getting function: %w", err)
 	}
 
 	pkg, err := opts.Client().FissionClientSet.CoreV1().Packages(fn.Spec.Package.PackageRef.Namespace).Get(input.Context(), fn.Spec.Package.PackageRef.Name, metav1.GetOptions{})
 	if err != nil {
-		return errors.Wrap(err, "error getting package")
+		return fmt.Errorf("error getting package: %w", err)
 	}
 
 	os.Stdout.Write(pkg.Spec.Deployment.Literal)