Rename files in quantized directory to conform with non-quantized countertpart filenames (#77037)

Summary:
X-link: pytorch/pytorch#77037

Names of analogous files in quantized directory (previously snake case) were inconsistent with
their non-quantized filename counterparts (pascal case). This is the first of a series of PRs that changes
all files in quantized (and sub-directories) dir to have pascal case.

`aten/src/ATen/native/quantized/qconv_unpack.cpp` has not been renamed yet
because (for reasons currently unknown) after making the name change, `import torch` produces the below error (`qlinear_unpack.cpp` renaming also seems to fail some phabricator CI tests for similar reasons). We suspect that these may be undefined errors and will revisit naming these files in a future PR.

```
terminate called after throwing an instance of 'c10::Error'
  what():  Type c10::intrusive_ptr<ConvPackedParamsBase<2> > could not be converted to any of the known types.
Exception raised from operator() at ../aten/src/ATen/core/jit_type.h:1735 (most recent call first):
frame #0: c10::Error::Error(c10::SourceLocation, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >) + 0x55 (0x7f26745c0c65 in /data/users/dzdang/pytorch/torch/lib/libc10.so)
frame #1: c10::detail::torchCheckFail(char const*, char const*, unsigned int, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) + 0xb1 (0x7f26745bdcd1 in /data/users/dzdang/pytorch/torch/lib/libc10.so)
frame #2: <unknown function> + 0x1494e24 (0x7f2663b14e24 in /data/users/dzdang/pytorch/torch/lib/libtorch_cpu.so)
frame #3: <unknown function> + 0xfed0bc (0x7f266366d0bc in /data/users/dzdang/pytorch/torch/lib/libtorch_cpu.so)
frame #4: c10::detail::infer_schema::make_function_schema(std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&, std::__cxx11::basic_string<char, std::char_traits<char>, std::allocator<char> >&&, c10::ArrayRef<c10::detail::infer_schema::ArgumentDef>, c10::ArrayRef<c10::detail::infer_schema::ArgumentDef>) + 0x5a (0x7f266366d71a in /data/users/dzdang/pytorch/torch/lib/libtorch_cpu.so)
frame #5: c10::detail::infer_schema::make_function_schema(c10::ArrayRef<c10::detail::infer_schema::ArgumentDef>, c10::ArrayRef<c10::detail::infer_schema::ArgumentDef>) + 0x7b (0x7f266366e06b in /data/users/dzdang/pytorch/torch/lib/libtorch_cpu.so)
frame #6: <unknown function> + 0x1493f32 (0x7f2663b13f32 in /data/users/dzdang/pytorch/torch/lib/libtorch_cpu.so)
frame #7: <unknown function> + 0xe227dd (0x7f26634a27dd in /data/users/dzdang/pytorch/torch/lib/libtorch_cpu.so)
frame #8: <unknown function> + 0x14e0a (0x7f268c934e0a in /lib64/ld-linux-x86-64.so.2)
..........................truncated.............
```

Reviewed By: malfet

Differential Revision: D36862332

Pulled By: dzdang

fbshipit-source-id: 598c36656b4e71f906d940e7ff19ecf82d43031d

Author: dzdang

torch_glow/src/PyTorchModelLoader.cpp

@@ -30,7 +30,7 @@
 
 #include <ATen/ATen.h>
 #include <ATen/core/dispatch/Dispatcher.h>
-#include <ATen/native/quantized/packed_params.h>
+#include <ATen/native/quantized/PackedParams.h>
 #include <limits>
 #include <torch/csrc/jit/ir/ir.h>
 #include <type_traits>

torch_glow/src/TorchGlowBackend.cpp

@@ -23,7 +23,7 @@
 #include "glow/Backend/BlockStreamBase.h"
 #include "glow/Runtime/ErrorReporter.h"
 
-#include <ATen/native/quantized/packed_params.h>
+#include <ATen/native/quantized/PackedParams.h>
 #include <torch/csrc/jit/backends/backend.h>
 #include <torch/csrc/jit/backends/backend_preprocess.h>
 #include <torch/csrc/jit/ir/alias_analysis.h>