utilize odin test -all-packages instead of (make/bat) scripts for running tests

tests/internal/test_pow.odin

@@ -1,4 +1,4 @@
-package test_internal_math_pow
+package test_internal
 
 @(require) import "core:log"
 import "core:math"
@@ -42,4 +42,4 @@ pow_test :: proc(t: ^testing.T) {
 			testing.expectf(t,  _v1 == _v2, "Expected math.pow2_f16(%d) == math.pow(2, %d) (= %04x), got %04x", exp, exp, _v1, _v2)
 		}
 	}
-}
+}