treewide: use nir_def_replace sometimes

Two Coccinelle patches here. Didn't catch nearly as much as I would've liked but
it's a start.

Coccinelle patch:

    @@
    expression intr, repl;
    @@

    -nir_def_rewrite_uses(&intr->def, repl);
    -nir_instr_remove(&intr->instr);
    +nir_def_replace(&intr->def, repl);

Coccinelle patch:

    @@
    identifier intr;
    expression instr, repl;
    @@

    nir_intrinsic_instr *intr = nir_instr_as_intrinsic(instr);
    ...
    -nir_def_rewrite_uses(&intr->def, repl);
    -nir_instr_remove(instr);
    +nir_def_replace(&intr->def, repl);

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Faith Ekstrand <faith.ekstrand@collabora.com>
Reviewed-by: Juan A. Suarez Romero <jasuarez@igalia.com> [broadcom]
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com> [lima]
Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com> [etna]
Reviewed-by: Pavel Ondračka <pavel.ondracka@gmail.com> [r300]
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29817>

src/compiler/nir/nir_lower_bool_to_float.c

@@ -184,8 +184,7 @@ lower_alu_instr(nir_builder *b, nir_alu_instr *alu, bool has_fcsel_ne,
 
    if (rep) {
       /* We've emitted a replacement instruction */
-      nir_def_rewrite_uses(&alu->def, rep);
-      nir_instr_remove(&alu->instr);
+      nir_def_replace(&alu->def, rep);
    } else {
       if (alu->def.bit_size == 1)
          alu->def.bit_size = 32;