GDScript: Fix constant conversions

modules/gdscript/tests/scripts/analyzer/features/assymetric_assignment_good.gd

@@ -0,0 +1,16 @@
+const const_color: Color = 'red'
+
+func func_color(arg_color: Color = 'blue') -> bool:
+	return arg_color == Color.BLUE
+
+@warning_ignore("assert_always_true")
+func test():
+	assert(const_color == Color.RED)
+
+	assert(func_color() == true)
+	assert(func_color('blue') == true)
+
+	var var_color: Color = 'green'
+	assert(var_color == Color.GREEN)
+
+	print('ok')

modules/gdscript/tests/scripts/analyzer/features/assymetric_assignment_good.out

@@ -0,0 +1,2 @@
+GDTEST_OK
+ok

modules/gdscript/tests/scripts/analyzer/features/const_conversions.gd

@@ -0,0 +1,24 @@
+const const_float_int: float = 19
+const const_float_plus: float = 12 + 22
+const const_float_cast: float = 76 as float
+
+const const_packed_empty: PackedFloat64Array = []
+const const_packed_ints: PackedFloat64Array = [52]
+
+@warning_ignore("assert_always_true")
+func test():
+	assert(typeof(const_float_int) == TYPE_FLOAT)
+	assert(str(const_float_int) == '19')
+	assert(typeof(const_float_plus) == TYPE_FLOAT)
+	assert(str(const_float_plus) == '34')
+	assert(typeof(const_float_cast) == TYPE_FLOAT)
+	assert(str(const_float_cast) == '76')
+
+	assert(typeof(const_packed_empty) == TYPE_PACKED_FLOAT64_ARRAY)
+	assert(str(const_packed_empty) == '[]')
+	assert(typeof(const_packed_ints) == TYPE_PACKED_FLOAT64_ARRAY)
+	assert(str(const_packed_ints) == '[52]')
+	assert(typeof(const_packed_ints[0]) == TYPE_FLOAT)
+	assert(str(const_packed_ints[0]) == '52')
+
+	print('ok')

modules/gdscript/tests/scripts/analyzer/features/const_conversions.out

@@ -0,0 +1,2 @@
+GDTEST_OK
+ok