rebase: bump github.com/hashicorp/vault/api from 1.2.0 to 1.3.0

Bumps [github.com/hashicorp/vault/api](https://github.com/hashicorp/vault) from 1.2.0 to 1.3.0.
- [Release notes](https://github.com/hashicorp/vault/releases)
- [Changelog](https://github.com/hashicorp/vault/blob/main/CHANGELOG.md)
- [Commits](https://github.com/hashicorp/vault/compare/v1.2.0...v1.3.0)

---
updated-dependencies:
- dependency-name: github.com/hashicorp/vault/api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

vendor/github.com/armon/go-metrics/start.go

@@ -6,7 +6,7 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/hashicorp/go-immutable-radix"
+	iradix "github.com/hashicorp/go-immutable-radix"
 )
 
 // Config is used to configure metrics settings
@@ -48,6 +48,11 @@ func init() {
 	globalMetrics.Store(&Metrics{sink: &BlackholeSink{}})
 }
 
+// Default returns the shared global metrics instance.
+func Default() *Metrics {
+	return globalMetrics.Load().(*Metrics)
+}
+
 // DefaultConfig provides a sane default configuration
 func DefaultConfig(serviceName string) *Config {
 	c := &Config{