[FIRRTL][EliminateWires] rwprobe op is not dominated by target

Nobody has claimed this yet.

## Reproducer

### FIRRTL

```firrtl
FIRRTL version 7.0.0

circuit Test:
public module Test:
output rw : RWProbe>
output rw2 : RWProbe>
wire p : UInt<1>
wire w : UInt<1>
invalidate w
define rw = rwprobe(w)
define rw2 = rwprobe(p)
connect p, w
```

-->

```
eliminate-wires-rwprobe-bug.fir:11:18: error: 'firrtl.ref.rwprobe' op is not dominated by target
define rw2 = rwprobe(p)
^
eliminate-wires-rwprobe-bug.fir:11:18: note: see current operation: %3 = "firrtl.ref.rwprobe"() <{target = #hw.innerNameRef<@Test::@sym_0>}> : () -> !firrtl.rwprobe>
eliminate-wires-rwprobe-bug.fir:7:5: note: target here
wire p : UInt<1>
^
```

### MLIR

``` mlir
firrtl.circuit "Test" {
firrtl.module @Test(out %rw: !firrtl.rwprobe>, out %rw2: !firrtl.rwprobe>) attributes {convention = #firrtl} {
%c0_ui1 = firrtl.constant 0 : !firrtl.uint<1>
%p = firrtl.wire sym @sym_0 : !firrtl.uint<1>
%w = firrtl.wire sym @sym : !firrtl.uint<1>
firrtl.matchingconnect %w, %c0_ui1 : !firrtl.uint<1>
%0 = firrtl.ref.rwprobe <@Test::@sym> : !firrtl.rwprobe>
firrtl.ref.define %rw, %0 : !firrtl.rwprobe>
%1 = firrtl.ref.rwprobe <@Test::@sym_0> : !firrtl.rwprobe>
firrtl.ref.define %rw2, %1 : !firrtl.rwprobe>
firrtl.matchingconnect %p, %w : !firrtl.uint<1>
}
}
```

--> (`circt-opt --firrtl-eliminate-wires --no-implicit-module`)

```
eliminate.mlir:9:10: error: 'firrtl.ref.rwprobe' op is not dominated by target
%1 = firrtl.ref.rwprobe <@Test::@sym_0> : !firrtl.rwprobe>
^
eliminate.mlir:9:10: note: see current operation: %3 = "firrtl.ref.rwprobe"() <{target = #hw.innerNameRef<@Test::@sym_0>}> : () -> !firrtl.rwprobe>
eliminate.mlir:4:10: note: target here
%p = firrtl.wire sym @sym_0 : !firrtl.uint<1>
^
```

Start by running the supplied FIRRTL reproducer and the MLIR reproducer with `circt-opt --firrtl-eliminate-wires --no-implicit-module`. Trace the FIRRTL EliminateWires pass from this failure; done means the rwprobe targeting `sym_0` no longer produces the reported dominance error, with the intended transformed IR verified by the relevant existing tests.

Written by the indexing model from the issue text.