Bump backoff/v3 to backoff/v4 (#26868)

This makes it so projects that are already using backoff don't need to
pull up an old version of it just because of vault/api. This major
version change is compatible with existing usage in code.

Refs #24707.

Co-authored-by: Violet Hynes <violet.hynes@hashicorp.com>

api/go.mod

@@ -10,7 +10,7 @@ go 1.21
 toolchain go1.21.8
 
 require (
-	github.com/cenkalti/backoff/v3 v3.0.0
+	github.com/cenkalti/backoff/v4 v4.3.0
 	github.com/go-jose/go-jose/v4 v4.0.1
 	github.com/go-test/deep v1.0.2
 	github.com/hashicorp/errwrap v1.1.0

api/go.sum

@@ -1,7 +1,7 @@
 github.com/armon/go-radix v0.0.0-20180808171621-7fddfc383310/go.mod h1:ufUuZ+zHj4x4TnLV4JWEpy2hxWSpsRywHrMgIH9cCH8=
 github.com/bgentry/speakeasy v0.1.0/go.mod h1:+zsyZBPWlz7T6j88CTgSN5bM796AkVf0kBD4zp0CCIs=
-github.com/cenkalti/backoff/v3 v3.0.0 h1:ske+9nBpD9qZsTBoF41nW5L+AIuFBKMeze18XQ3eG1c=
-github.com/cenkalti/backoff/v3 v3.0.0/go.mod h1:cIeZDE3IrqwwJl6VUwCN6trj1oXrTS4rc0ij+ULvLYs=
+github.com/cenkalti/backoff/v4 v4.3.0 h1:MyRJ/UdXutAwSAT+s3wNd7MfTIcy71VQueUuFK343L8=
+github.com/cenkalti/backoff/v4 v4.3.0/go.mod h1:Y3VNntkOUPxTVeUxJ/G5vcM//AlwfmyYozVcomhLiZE=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=

api/lifetime_watcher.go

@@ -10,7 +10,7 @@ import (
 	"sync"
 	"time"
 
-	"github.com/cenkalti/backoff/v3"
+	"github.com/cenkalti/backoff/v4"
 )
 
 var (

changelog/26868.txt

@@ -0,0 +1,3 @@
+```release-note:change
+api: Update backoff/v3 to backoff/v4.3.0
+```