Consistently use CharArrayPool in JsonWriter to cut cost of initializing char arrays

[gathogojr]

Issues

This pull request fixes issue #2074.

Description

Consistently use CharArrayPool in JsonWriter to cut cost of initializing char arrays

Notes:

• CharArrayPool is already used in JsonWriter class. It was just not being passed along in some instances.
• There's no real value in passing the CharArrayPool parameter for the methods listed below because we only use it if the input has special characters. I decided to still pass the parameter just to keep things consistent and avoid confusion.
  • WriteName(string)/WriteNameAsync(string) - name should not contain special chars
  • WriteValue(long)/WriteValueAsync(long) - - special chars not expected when the value is converted to string (IEEE 754 compatible)
  • WriteValue(decimal)/WriteValueAsync(decimal) - special chars not expected when the value is converted to string (IEEE 754 compatible)

Checklist (Uncheck if it is not completed)

• Test cases added
• Build and test with one-click build and test script passed

Additional work necessary

If documentation update is needed, please add "Docs Needed" label to the issue and provide details about the required document change in the issue.

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Label      : Small
Size       : +58 -14
Percentile : 28.8%

Total files changed: 5

Change summary by file extension:
.cs : +58 -14

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[marabooy]

nit: Wrap the arguments.