[Bug-Candidate]: Failed to convert IR to SSA for Initializable contract.

### Describe the issue:

When trying to run slither locally against a repo that works with slither actions v4 on github, I get a strange failure.

### Code example to reproduce the issue:

Contract not public yet, but using solady Initializable, UUPSUpgradeable

### Version:

0.10.3

### Relevant log output:

```shell
/.solc-select/artifacts/solc-0.8.26/solc-0.8.26 forge-std/=lib/forge-std/src/ solady/=lib/solady/src/ src/Chaos.sol --combined-json abi,ast,bin,bin-runtime,srcmap,srcmap-runtime,userdoc,devdoc,hashes --optimize --optimize-runs 200 --via-ir --evm-version paris --allow-paths .,/Users/me/Code/MyProjects/warlock/warlock-chaos/src' running
ERROR:SlitherSolcParsing:
Failed to convert IR to SSA for Initializable contract. Please open an issue https://github.com/crytic/slither/issues.

Traceback (most recent call last):
File "/opt/homebrew/bin/slither", line 8, in
sys.exit(main())
File "/opt/homebrew/lib/python3.10/site-packages/slither/__main__.py", line 782, in main
main_impl(all_detector_classes=detectors, all_printer_classes=printers)
File "/opt/homebrew/lib/python3.10/site-packages/slither/__main__.py", line 888, in main_impl
) = process_all(filename, args, detector_classes, printer_classes)
File "/opt/homebrew/lib/python3.10/site-packages/slither/__main__.py", line 113, in process_all
) = process_single(compilation, args, detector_classes, printer_classes)
File "/opt/homebrew/lib/python3.10/site-packages/slither/__main__.py", line 80, in process_single
slither = Slither(target, ast_format=ast, **vars(args))
File "/opt/homebrew/lib/python3.10/site-packages/slither/slither.py", line 202, in __init__
self._init_parsing_and_analyses(kwargs.get("skip_analyze", False))
File "/opt/homebrew/lib/python3.10/site-packages/slither/slither.py", line 221, in _init_parsing_and_analyses
raise e
File "/opt/homebrew/lib/python3.10/site-packages/slither/slither.py", line 217, in _init_parsing_and_analyses
parser.analyze_contracts()
File "/opt/homebrew/lib/python3.10/site-packages/slither/solc_parsing/slither_compilation_unit_solc.py", line 593, in analyze_contracts
self._convert_to_slithir()
File "/opt/homebrew/lib/python3.10/site-packages/slither/solc_parsing/slither_compilation_unit_solc.py", line 834, in _convert_to_slithir
raise e
File "/opt/homebrew/lib/python3.10/site-packages/slither/solc_parsing/slither_compilation_unit_solc.py", line 829, in _convert_to_slithir
contract.convert_expression_to_slithir_ssa()
File "/opt/homebrew/lib/python3.10/site-packages/slither/core/declarations/contract.py", line 1577, in convert_expression_to_slithir_ssa
func.generate_slithir_ssa(all_ssa_state_variables_instances)
File "/opt/homebrew/lib/python3.10/site-packages/slither/core/declarations/function_contract.py", line 140, in generate_slithir_ssa
add_ssa_ir(self, all_ssa_state_variables_instances)
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 206, in add_ssa_ir
fix_phi_rvalues_and_storage_ref(
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 526, in fix_phi_rvalues_and_storage_ref
fix_phi_rvalues_and_storage_ref(
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 526, in fix_phi_rvalues_and_storage_ref
fix_phi_rvalues_and_storage_ref(
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 526, in fix_phi_rvalues_and_storage_ref
fix_phi_rvalues_and_storage_ref(
[Previous line repeated 4 more times]
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 496, in fix_phi_rvalues_and_storage_ref
variables = [
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 497, in
last_name(dst, ir.lvalue, init_local_variables_instances) for dst in ir.nodes
File "/opt/homebrew/lib/python3.10/site-packages/slither/slithir/utils/ssa.py", line 363, in last_name
assert candidates
AssertionError
```

Reproduce with Slither 0.10.3 against a project using solady Initializable/UUPSUpgradeable and solc 0.8.26 with --via-ir. Trace slither/slithir/utils/ssa.py, especially fix_phi_rvalues_and_storage_ref and last_name, from the reported AssertionError; done means conversion no longer fails and the regression is covered by relevant tests.

Written by the indexing model from the issue text.