[PyTorch] shrink Argument

[swolchok]

Stack from ghstack:

• [PyTorch] Store Argument::alias_info_ on the heap #64824
• [PyTorch] add fastToString for infer_schema #64823
• [PyTorch] Use SmallVector for FunctionSchema Arguments #64691
• [PyTorch] Fix missing moves in SchemaParser::parseArgument #64839
• [PyTorch] Improve OperatorEntry::getKernelForDispatchKey #64838
• avoid moving Argument in infer_schema #64822
• [PyTorch] Fix missing move in Argument ctor #64821
• -> [PyTorch] shrink Argument #64820
• [PyTorch] Compare pointers before calling expensive Type comparison #64784

Putting boolean fields next to each other avoids wasting space for padding.

Differential Revision: D30860717

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💊 CI failures summary and remediations

As of commit 6e0f28d (more details on the Dr. CI page):

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• 1/1 failures introduced in this PR

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🕵️ 1 new failure recognized by patterns

The following CI failures do not appear to be due to upstream breakages:

linux-bionic-py3.6-clang9 / test (noarch, 1, 1, linux.2xlarge) (1/1)

Step: "Unknown" (full log | diagnosis details | 🔁 rerun)

2021-09-17T01:18:05.1432380Z CONTINUE_THROUGH_ERROR: false

2021-09-17T01:18:05.1427947Z   ALPINE_IMAGE: 308535385114.dkr.ecr.us-east-1.amazonaws.com/tool/alpine
2021-09-17T01:18:05.1428505Z   PR_LABELS: [
  "cla signed"
]
2021-09-17T01:18:05.1429449Z   DOCKER_IMAGE: 308535385114.dkr.ecr.us-east-1.amazonaws.com/pytorch/pytorch-linux-bionic-py3.6-clang9:74e757e8b0cf750d2f91db6aa4c29640abce32ea
2021-09-17T01:18:05.1430540Z   JOB_BASE_NAME: linux-bionic-py3.6-clang9-test
2021-09-17T01:18:05.1431019Z   TEST_CONFIG: noarch
2021-09-17T01:18:05.1431331Z   SHARD_NUMBER: 1
2021-09-17T01:18:05.1431620Z   NUM_TEST_SHARDS: 1
2021-09-17T01:18:05.1431985Z   PYTORCH_IGNORE_DISABLED_ISSUES: 
2021-09-17T01:18:05.1432380Z   CONTINUE_THROUGH_ERROR: false
2021-09-17T01:18:05.1432698Z   SHM_SIZE: 1g
2021-09-17T01:18:05.1432979Z   PR_NUMBER: 64820
2021-09-17T01:18:05.1433263Z ##[endgroup]
2021-09-17T01:18:18.6428497Z Processing ./dist/torch-1.10.0a0+git7af17f4-cp36-cp36m-linux_x86_64.whl
2021-09-17T01:18:18.6711637Z Requirement already satisfied: typing-extensions in /opt/conda/lib/python3.6/site-packages (from torch==1.10.0a0+git7af17f4) (3.10.0.0)
2021-09-17T01:18:18.6718619Z Requirement already satisfied: dataclasses in /opt/conda/lib/python3.6/site-packages (from torch==1.10.0a0+git7af17f4) (0.8)
2021-09-17T01:18:18.9547268Z Installing collected packages: torch
2021-09-17T01:18:24.1563084Z Successfully installed torch-1.10.0a0+git7af17f4
2021-09-17T01:18:24.2381276Z ++++ dirname .jenkins/pytorch/common.sh
2021-09-17T01:18:24.2388092Z +++ cd .jenkins/pytorch

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This pull request has been merged in 5a3475d.