uyuni: Use default HTTP client and set relative paths (#10814)

Signed-off-by: Julien Pivotto <roidelapluie@o11y.eu>

config/config_test.go

@@ -995,6 +995,7 @@ var expectedConf = &Config{
 					Entitlement:      "monitoring_entitled",
 					Separator:        ",",
 					RefreshInterval:  model.Duration(60 * time.Second),
+					HTTPClientConfig: config.DefaultHTTPClientConfig,
 				},
 			},
 		},

discovery/uyuni/uyuni.go

@@ -55,6 +55,7 @@ var DefaultSDConfig = SDConfig{
 	Entitlement:      "monitoring_entitled",
 	Separator:        ",",
 	RefreshInterval:  model.Duration(1 * time.Minute),
+	HTTPClientConfig: config.DefaultHTTPClientConfig,
 }
 
 func init() {
@@ -117,6 +118,11 @@ func (c *SDConfig) NewDiscoverer(opts discovery.DiscovererOptions) (discovery.Di
 	return NewDiscovery(c, opts.Logger)
 }
 
+// SetDirectory joins any relative file paths with dir.
+func (c *SDConfig) SetDirectory(dir string) {
+	c.HTTPClientConfig.SetDirectory(dir)
+}
+
 // UnmarshalYAML implements the yaml.Unmarshaler interface.
 func (c *SDConfig) UnmarshalYAML(unmarshal func(interface{}) error) error {
 	*c = DefaultSDConfig