Merge vec_step and vec_align binaries into a new vectors binary (#926)

* Merge vec_step and vec_align binaries into a new vectors binary

This change just merges the two suites to reuse common functions
and definitions. There is probably room for further code consolidation
but probably best done as a separate change.

Contributes to #683

Signed-off-by: Kevin Petit <kevin.petit@arm.com>

* format fixes

test_conformance/vectors/CMakeLists.txt

@@ -0,0 +1,12 @@
+set(MODULE_NAME VECTORS)
+
+set(${MODULE_NAME}_SOURCES
+    globals.cpp
+        main.cpp
+        structs.cpp
+        test_step.cpp
+        test_vec_align.cpp
+        type_replacer.cpp
+)
+
+include(../CMakeCommon.txt)