fix: multiple fixes in prefix exclude implementation (#14877)

- do not need to restrict prefix exclusions that do not
  have `/` as suffix, relax this requirement as spark may
  have staging folders with other autogenerated characters
  , so we are better off doing full prefix March and skip. 

- multiple delete objects was incorrectly creating a
  null delete marker on a versioned bucket instead of
  creating a proper versioned delete marker.

- do not suspend paths on the excluded prefixes during
  delete operations to avoid creating `null` delete markers,
  honor suspension of versioning only at bucket level for
  delete markers.

internal/bucket/versioning/versioning.go

@@ -39,7 +39,6 @@ const (
 var (
 	errExcludedPrefixNotSupported = Errorf("excluded prefixes extension supported only when versioning is enabled")
 	errTooManyExcludedPrefixes    = Errorf("too many excluded prefixes")
-	errInvalidPrefixPattern       = Errorf("invalid prefix pattern")
 )
 
 // ExcludedPrefix - holds individual prefixes excluded from being versioned.
@@ -73,11 +72,6 @@ func (v Versioning) Validate() error {
 		if len(v.ExcludedPrefixes) > maxExcludedPrefixes {
 			return errTooManyExcludedPrefixes
 		}
-		for _, sprefix := range v.ExcludedPrefixes {
-			if !strings.HasSuffix(sprefix.Prefix, "/") {
-				return errInvalidPrefixPattern
-			}
-		}
 
 	case Suspended:
 		if len(v.ExcludedPrefixes) > 0 {