[FEA] Set sql.json.read.double.enabled and sql.csv.read.double.enabled to true by default

[sameerz]

Is your feature request related to a problem? Please describe.
In issue #5323 and PR #5441 we enabled floating point and some double operations by default. We should also enable the following double configurations by default:

spark.rapids.sql.csv.read.double.enabled
spark.rapids.sql.json.read.double.enabled

Describe the solution you'd like
Update our configurations and documentation for the above settings to true.

Describe alternatives you've considered
We've had these operations false by default due to slight variations between CPU and GPU for float and double calculations. Setting these to true should not impact most use cases.

Additional context
N/A