[ET-VK][Ops] aten.tan.default from scratch implementation

[ahmtox]

Stack from ghstack (oldest at bottom):

• (to be filled)

Following the instructions here for creating a new operator from scratch for learning purposes:
https://www.internalfb.com/wiki/ExecuTorch_Vulkan_Backend/Development_0/Adding_a_New_Operator_Implementation/

Goal is to create a tan operator and its test case

Differential Revision: D75100188

[pytorch-bot]

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❌ 3 New Failures, 1 Unrelated Failure

As of commit 7c79073 with merge base 6a8d286 ():

NEW FAILURES - The following jobs have failed:

• Check Labels / Check labels (gh)
  RuntimeError: Error checking labels: PR does not have required labels
• Lint / lintrunner / linux-job (gh)
  >>> Lint for backends/vulkan/runtime/graph/ops/impl/Tan.cpp:
• pull / unittest-editable / macos / macos-job (gh)
  RuntimeError: Command bash /Users/ec2-user/runner/_work/_temp/exec_script failed with exit code 1

FLAKY - The following job failed but was likely due to flakiness present on trunk:

• pull / test-binary-size-linux-gcc / linux-job (gh) (matched linux rule in flaky-rules.json)
  The process '/usr/bin/git' failed with exit code 128

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