JIT: Release `JitDisasm` does not include function names for calls on arm64

[jakobbotsch]

E.g. I see

; Assembly listing for method vb_playground.M1:Main() (FullOpts)
; Emitting BLENDED_CODE for arm64 on Apple
; FullOpts code
; optimized code
; fp based frame
; partially interruptible
; No PGO data
; 0 inlinees with PGO data; 2 single block inlinees; 0 inlinees without PGO data

G_M000_IG01:                ;; offset=0x0000
            stp     fp, lr, [sp, #-0x10]!
            mov     fp, sp

G_M000_IG02:                ;; offset=0x0008
            movz    x0, #0x2570
            movk    x0, #0x99F LSL #16
            movk    x0, #1 LSL #32
            bl      CORINFO_HELP_NEWSFAST
            mov     w1, #3
            movz    x2, #0x7C00
            movk    x2, #590 LSL #16
            movk    x2, #1 LSL #32
            ldr     x2, [x2]
            blr     x2

G_M000_IG03:                ;; offset=0x0030
            ldp     fp, lr, [sp], #0x10
            ret     lr

; Total bytes of code 56

when using JitDisasm on preview3. I would expect a comment with the function name for x2 (IIRC that was the primary reason we did work to store debug info in this case)

cc @dotnet/jit-contrib

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