fuir: Improved debugging code dump output

[fridis]

Now includes arguments and result types for Calls, proper labels for match, constant data for constants.

Also reduced noise by not printing code that is not needed (FUIR.clazzNeedsCode) and noice code block ids.

Here is an exmaple output:

         > ./build/bin/fz -XdumpFUIR -e "for a := 1, a+1 while a < 10 else say a" | tail -n 30
        Code for #loop0(outer universe#0, a i32) unit
        l3:	0: Current
        	1: Call #loop0.a(outer #loop0) i32
        	2: Const of type i32 00 00 00 04 0a 00 00 00
        	3: Call infix < i32(outer universe#0, a i32, b i32) bool
        	4: Match 0=>l1 1=>l2
        l1:	0: Current
        	1: Call #loop0.a(outer #loop0) i32
        	2: Const of type i32 00 00 00 04 01 00 00 00
        	3: Call i32.infix +(outer i32, other i32) i32
        	4: Current
        	5: Assign to #loop0.a
        	6: Current
        	7: Call #loop0.a(outer #loop0) i32
        	8: Call #loop0(outer universe#0, a i32) unit
        	9: Current
        	10: Assign to #loop0.#exprResult0
        	goto l3_4
        l2:	0: Current
        	1: Call #loop0.a(outer #loop0) i32
        	2: Box i32 => ref i32
        	3: Call say(outer universe#0, s Any) unit
        	4: Current
        	5: Assign to #loop0.#exprResult0
        	goto l3_4
        l3_4:
        	7: Current
        	8: Call #loop0.#exprResult0(outer #loop0) unit
        	9: Current
        	10: Assign to #loop0.#result