Auth: Guarantee consistency of signed SigV4 headers (#45054) (#45075)

* use latest sigv4 changes

* update configuration docs

* lint

* reformat lint ignore

* specific version for docs

(cherry picked from commit fc42dfe396)

Co-authored-by: Will Browne <wbrowne@users.noreply.github.com>

pkg/setting/setting.go

@@ -284,6 +284,7 @@ type Cfg struct {
 	LoginMaxLifetime             time.Duration
 	TokenRotationIntervalMinutes int
 	SigV4AuthEnabled             bool
+	SigV4VerboseLogging          bool
 	BasicAuthEnabled             bool
 	AdminUser                    string
 	AdminPassword                string
@@ -1259,6 +1260,7 @@ func readAuthSettings(iniFile *ini.File, cfg *Cfg) (err error) {
 	// SigV4
 	SigV4AuthEnabled = auth.Key("sigv4_auth_enabled").MustBool(false)
 	cfg.SigV4AuthEnabled = SigV4AuthEnabled
+	cfg.SigV4VerboseLogging = auth.Key("sigv4_verbose_logging").MustBool(false)
 
 	// anonymous access
 	AnonymousEnabled = iniFile.Section("auth.anonymous").Key("enabled").MustBool(false)