Modularize random distribution tensor creation ops

[tafsiri]

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This change is 

[lina128]

LGTM!

[nsthorat]

Reviewed 17 of 17 files at r1.
Reviewable status: complete! 2 of 1 approvals obtained (waiting on @annxingyuan, @dsmilkov, @nsthorat, and @tafsiri)

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tfjs-core/src/ops/multinomial.ts, line 23 at r1 (raw file):

import {TensorLike} from '../types';
import {op} from './operation';
/**

nit add blank line above this

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tfjs-core/src/ops/multinomial.ts, line 63 at r1 (raw file):

  return origRank === 1 ? res.as1D() : res;
}
export const multinomial = op({multinomial_});

nit add blank line above this

these nits for other files too (technically the style guide, not sure why lint doesnt do it)

[nsthorat]

Nice work!!

[tafsiri]

Reviewable status: complete! 2 of 1 approvals obtained (waiting on @annxingyuan and @dsmilkov)

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tfjs-core/src/ops/multinomial.ts, line 23 at r1 (raw file):

Previously, nsthorat (Nikhil Thorat) wrote…

nit add blank line above this

Done

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tfjs-core/src/ops/multinomial.ts, line 63 at r1 (raw file):

Previously, nsthorat (Nikhil Thorat) wrote…

nit add blank line above this

these nits for other files too (technically the style guide, not sure why lint doesnt do it)

Done, here and elsewhere

[dsmilkov]

Reviewed 13 of 17 files at r1, 4 of 4 files at r2.
Reviewable status: complete! 3 of 1 approvals obtained (waiting on @annxingyuan and @dsmilkov)