chore: update gcr and docker cred helpers (#2910)

vendor/github.com/docker/cli/cli/config/configfile/file.go

@@ -37,7 +37,6 @@ type ConfigFile struct {
 	PruneFilters         []string                     `json:"pruneFilters,omitempty"`
 	Proxies              map[string]ProxyConfig       `json:"proxies,omitempty"`
 	Experimental         string                       `json:"experimental,omitempty"`
-	StackOrchestrator    string                       `json:"stackOrchestrator,omitempty"` // Deprecated: swarm is now the default orchestrator, and this option is ignored.
 	CurrentContext       string                       `json:"currentContext,omitempty"`
 	CLIPluginsExtraDirs  []string                     `json:"cliPluginsExtraDirs,omitempty"`
 	Plugins              map[string]map[string]string `json:"plugins,omitempty"`
@@ -95,6 +94,9 @@ func (configFile *ConfigFile) ContainsAuth() bool {
 
 // GetAuthConfigs returns the mapping of repo to auth configuration
 func (configFile *ConfigFile) GetAuthConfigs() map[string]types.AuthConfig {
+	if configFile.AuthConfigs == nil {
+		configFile.AuthConfigs = make(map[string]types.AuthConfig)
+	}
 	return configFile.AuthConfigs
 }
 

vendor/github.com/docker/cli/cli/config/credentials/file_store.go

@@ -52,7 +52,8 @@ func (c *fileStore) GetAll() (map[string]types.AuthConfig, error) {
 
 // Store saves the given credentials in the file store.
 func (c *fileStore) Store(authConfig types.AuthConfig) error {
-	c.file.GetAuthConfigs()[authConfig.ServerAddress] = authConfig
+	authConfigs := c.file.GetAuthConfigs()
+	authConfigs[authConfig.ServerAddress] = authConfig
 	return c.file.Save()
 }