early validation - bump hcl-lang and reflect upstream changes (#1416)

* deps: bump hcl-lang to aa9b38d (#1414)

* re-define decoupled validators

internal/decoder/decoder.go

@@ -30,6 +30,7 @@ func modulePathContext(mod *state.Module, schemaReader state.SchemaReader, modRe
 		ReferenceTargets: make(reference.Targets, 0),
 		Files:            make(map[string]*hcl.File, 0),
 		Functions:        coreFunctions(mod),
+		Validators:       moduleValidators,
 	}
 
 	for _, origin := range mod.RefOrigins {

internal/decoder/validators.go

@@ -0,0 +1,19 @@
+// Copyright (c) HashiCorp, Inc.
+// SPDX-License-Identifier: MPL-2.0
+
+package decoder
+
+import (
+	"github.com/hashicorp/hcl-lang/validator"
+)
+
+var moduleValidators = []validator.Validator{
+	validator.BlockLabelsLength{},
+	validator.DeprecatedAttribute{},
+	validator.DeprecatedBlock{},
+	validator.MaxBlocks{},
+	validator.MinBlocks{},
+	validator.MissingRequiredAttribute{},
+	validator.UnexpectedAttribute{},
+	validator.UnexpectedBlock{},
+}