…ize arithmetic operators (pytorch#104718)

Summary:
Pull Request resolved: pytorch#104718

## This diff
1. Templatizes the arithmetic operators
2. Adds general broadcasting to arithmetic operators

Follow on diff:
* Templatize the remaining arithmetic operators (scalar, in-place)
* Rename Arithmetic.cpp --> BinaryOps.cpp

## Templatizing arithmetic ops
Create template so that `add`, `sub`, `mul`, `div` can be generated from one shader. See Stephen's comment on v2. Note that there is a special case for div, where we account for the divide by 0.

## Adding general broadcasting to arithmetic ops
Currently, broadcast is supported for 4D tensors where, if the batch or channel dimensions are not equal, then the batch and channel of one tensor must both be 1, ie:
```
tensorA NCHW:
5, 2, 3, 3
tensorB NCHW:
1, 1, 3, 3 --> batch=1, channel=1
```
This diff adds broadcast support for 4D tensors where the batch and channel of a tensor are different, ie:
```
tensorA NCHW:
5, 1, 3, 3
tensorB NCHW:
1, 5, 3, 3
```

Broadcast rules:
```
- tensorA.dim()[x] = tensorB.dim()[x]
- tensorA.dim()[x] == 1 || tensorB.dim()[x] == 1
- tensorA.dim()[x] does not exist || tensorB.dim()[x] does not exist
```

Broadcast method:

1. Pass `output`, `input` and `other` tensors to the shader
2. Iterate through the output texture to calculate the value of each texel (no repeating)
3. Mapping NHW positions: use modulo
4. Mapping C position: divide pos.z by ceil(C/4) to map to original tensor range

 ---
Also some test refactoring to reduce repeated setup code.

Test Plan:
New tests:

Add
```
[ RUN      ] VulkanAPITest.add_broadcast5
[       OK ] VulkanAPITest.add_broadcast5 (0 ms)
[ RUN      ] VulkanAPITest.add_broadcast6
[       OK ] VulkanAPITest.add_broadcast6 (0 ms)
```

Sub
```
[ RUN      ] VulkanAPITest.sub_broadcast5
[       OK ] VulkanAPITest.sub_broadcast5 (0 ms)
[ RUN      ] VulkanAPITest.sub_broadcast6
[       OK ] VulkanAPITest.sub_broadcast6 (0 ms)
```

Mul
```
[ RUN      ] VulkanAPITest.mul_broadcast5
[       OK ] VulkanAPITest.mul_broadcast5 (1 ms)
[ RUN      ] VulkanAPITest.mul_broadcast6
[       OK ] VulkanAPITest.mul_broadcast6 (1 ms)
```

Div
```
[ RUN      ] VulkanAPITest.div_broadcast5
[       OK ] VulkanAPITest.div_broadcast5 (1 ms)
[ RUN      ] VulkanAPITest.div_broadcast6
[       OK ] VulkanAPITest.div_broadcast6 (2 ms)
```

All tests:
https://www.internalfb.com/phabricator/paste/view/P781794761

```
xplat/caffe2/aten/src/ATen/test/vulkan_api_test.cpp:6377: Skipped
QueryPool is not available
[  SKIPPED ] VulkanAPITest.querypool_flushed_shader_log (0 ms)
[----------] 307 tests from VulkanAPITest (5576 ms total)

[----------] Global test environment tear-down
[==========] 307 tests from 1 test suite ran. (5576 ms total)
[  PASSED  ] 306 tests.
[  SKIPPED ] 1 test, listed below:
[  SKIPPED ] VulkanAPITest.querypool_flushed_shader_log

  YOU HAVE 5 DISABLED TESTS
```

Test Vulkan Delegate on OD:
```
buck2 test 'fbcode//mode/dev' fbcode//executorch/backends/vulkan/test:test_vulkan_delegate -- --exact 'executorch/backends/vulkan/test:test_vulkan_delegate - test_vulkan_backend_add (executorch.backends.vulkan.test.test_vulkan_delegate.TestBackends)'

Tests finished: Pass 1. Fail 0. Fatal 0. Skip 0. Build failure 0
```

Run clang-format on glsl files and Arithmetic.cpp

Reviewed By: SS-JIA

Differential Revision: D46874508

fbshipit-source-id: e2c0f4c4525c5d567c75c2e0a50065e00de24066