Don't use UserDataReader for Increment transform

[schmidt-sebastian]

Small simplification for the NumericIncrementFieldValueImpl, which doesn't need a UserDataReader to convert a number into a number.

[changeset-bot]

🦋 Changeset is good to go

Latest commit: 0834a59

We got this.

This PR includes changesets to release 0 packages

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[google-oss-bot]

Binary Size Report

Affected SDKs

• @firebase/firestore

  Type	Base (a754645)	Head (2782130)	Diff
  browser	248 kB	248 kB	-4 B (-0.0%)
  esm2017	194 kB	194 kB	-4 B (-0.0%)
  main	493 kB	493 kB	-79 B (-0.0%)
  module	246 kB	246 kB	-4 B (-0.0%)
  react-native	194 kB	194 kB	-4 B (-0.0%)

• @firebase/firestore/exp

  Type	Base (a754645)	Head (2782130)	Diff
  main	395 kB	395 kB	-83 B (-0.0%)

• @firebase/firestore/lite

  Type	Base (a754645)	Head (2782130)	Diff
  main	141 kB	141 kB	-83 B (-0.1%)

• @firebase/firestore/memory

  Type	Base (a754645)	Head (2782130)	Diff
  browser	186 kB	186 kB	-4 B (-0.0%)
  esm2017	145 kB	145 kB	-9 B (-0.0%)
  main	363 kB	363 kB	-79 B (-0.0%)
  module	184 kB	184 kB	-4 B (-0.0%)
  react-native	145 kB	145 kB	-9 B (-0.0%)

• firebase

  Type	Base (a754645)	Head (2782130)	Diff
  firebase-firestore.js	286 kB	286 kB	+9 B (+0.0%)
  firebase-firestore.memory.js	226 kB	226 kB	+12 B (+0.0%)
  firebase.js	820 kB	820 kB	+9 B (+0.0%)

Test Logs

• Base (a754645e): https://github.com/firebase/firebase-js-sdk/actions/runs/153340560
• Head (27821301): https://github.com/firebase/firebase-js-sdk/actions/runs/153631266