Beef up documentation on Dispatcher.h, reorder methods for clarity.

[ezyang]

Stack from ghstack:

• Finish implementing schema-less impl, switch all internal registrations to it #34456 WIP
• Add torch::jit::parseName (mirroring parseSchema/parseSchemaOrName) #34455 Add torch::jit::parseName (mirroring parseSchema/parseSchemaOrName)
• Relax internal invariants of Dispatcher in preparation for schema-less registration #34221 Relax internal invariants of Dispatcher in preparation for schema-less registration
• Delete OperatorOptions, absorb AliasAnalysisKind into FunctionSchema. #34160 Delete OperatorOptions, absorb AliasAnalysisKind into FunctionSchema.
• Beef up documentation on Dispatcher.h, reorder methods for clarity. #33838 Beef up documentation on Dispatcher.h, reorder methods for clarity.

Signed-off-by: Edward Z. Yang ezyang@fb.com

Differential Revision: D20227875

[dr-ci]

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[facebook-github-bot]

@ezyang merged this pull request in b2344b7.