Merge pull request #63100 from ravisantoshgudimetla/priority-beta-api

Automatic merge from submit-queue (batch tested with PRs 55511, 63372, 63400, 63100, 63769). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

Create pkg/scheduling/apis/v1beta1 and move priorityClass to beta

**What this PR does / why we need it**:
This is for creating pkg/apis/scheduling/v1beta1 so that priorityClasses could be moved to beta.

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Part of #57471

**Special notes for your reviewer**:
/cc @bsalamat @aveshagarwal

**Release note**:

```release-note
The `PriorityClass` API is promoted to `scheduling.k8s.io/v1beta1`
```

Kubernetes-commit: a1b54f3c99f2ae4d7d10c269939e5c0bb6d03e6f

vendor/k8s.io/apimachinery/pkg/api/resource/quantity.go

@@ -25,8 +25,6 @@ import (
 	"strconv"
 	"strings"
 
-	flag "github.com/spf13/pflag"
-
 	inf "gopkg.in/inf.v0"
 )
 
@@ -747,43 +745,3 @@ func (q *Quantity) Copy() *Quantity {
 		Format: q.Format,
 	}
 }
-
-// qFlag is a helper type for the Flag function
-type qFlag struct {
-	dest *Quantity
-}
-
-// Sets the value of the internal Quantity. (used by flag & pflag)
-func (qf qFlag) Set(val string) error {
-	q, err := ParseQuantity(val)
-	if err != nil {
-		return err
-	}
-	// This copy is OK because q will not be referenced again.
-	*qf.dest = q
-	return nil
-}
-
-// Converts the value of the internal Quantity to a string. (used by flag & pflag)
-func (qf qFlag) String() string {
-	return qf.dest.String()
-}
-
-// States the type of flag this is (Quantity). (used by pflag)
-func (qf qFlag) Type() string {
-	return "quantity"
-}
-
-// QuantityFlag is a helper that makes a quantity flag (using standard flag package).
-// Will panic if defaultValue is not a valid quantity.
-func QuantityFlag(flagName, defaultValue, description string) *Quantity {
-	q := MustParse(defaultValue)
-	flag.Var(NewQuantityFlagValue(&q), flagName, description)
-	return &q
-}
-
-// NewQuantityFlagValue returns an object that can be used to back a flag,
-// pointing at the given Quantity variable.
-func NewQuantityFlagValue(q *Quantity) flag.Value {
-	return qFlag{q}
-}