addrs: ModuleInstance methods for building AbsProviderConfig

These helpers, similar to other such methods on ModuleInstance, are useful
for programmatically constructing provider config addresses, particularly
in tests where this is more straightforward than parsing from strings.

addrs/provider_config.go

@@ -174,6 +174,29 @@ func ParseAbsProviderConfig(traversal hcl.Traversal) (AbsProviderConfig, tfdiags
 	return ret, diags
 }
 
+// ProviderConfigDefault returns the address of the default provider config
+// of the given type inside the recieving module instance.
+func (m ModuleInstance) ProviderConfigDefault(name string) AbsProviderConfig {
+	return AbsProviderConfig{
+		Module: m,
+		ProviderConfig: ProviderConfig{
+			Type: name,
+		},
+	}
+}
+
+// ProviderConfigAliased returns the address of an aliased provider config
+// of with given type and alias inside the recieving module instance.
+func (m ModuleInstance) ProviderConfigAliased(name, alias string) AbsProviderConfig {
+	return AbsProviderConfig{
+		Module: m,
+		ProviderConfig: ProviderConfig{
+			Type:  name,
+			Alias: alias,
+		},
+	}
+}
+
 // Inherited returns an address that the receiving configuration address might
 // inherit from in a parent module. The second bool return value indicates if
 // such inheritance is possible, and thus whether the returned address is valid.