Feature/support env hcl and interpolations (#1423)

* support HCL language for env variables

Signed-off-by: xtphate <65117176+XT-Phate@users.noreply.github.com>

pkg/state/testdata/values.7.hcl

@@ -0,0 +1,42 @@
+locals {
+  localInValues7File = "localInValues7"
+}
+
+values {
+  a = "a"
+  b = "b"
+  c = "${hv.a}${hv.b}"
+
+  map = {
+    "a" = "${hv.a}"
+  } 
+
+  list = [
+    hv.b
+  ]
+
+  nestedmap = {
+    submap = {
+      subsubmap = {
+        hello = hv.c
+      }
+    }
+  }
+
+  ternary = true ? true : false
+
+  fromMap = "${hv.map.a}${hv.nestedmap.submap.subsubmap.hello}"
+
+  expressionInText = "%{if hv.ternary }yes%{else}no%{endif}"
+  insideFor = "%{for i in hv.list }${i}%{endfor}"
+
+  multi_block = hv.block
+
+  crossfile = hv.crossfile_var
+
+  localRef = local.localInValues7File
+}
+
+values {
+  block = "block"
+}

pkg/state/testdata/values.8.hcl

@@ -0,0 +1,3 @@
+values {
+  crossfile_var = "crossfile var"
+}