feat(testing): disable jest runtime by default when inferring targets (#29917)

This PR updates `@nx/jest/plugin` such that `disableJestRuntime` option
is true by default. Users will need to set it to false to bring in
`jest-config` and `jest-runtime` to compute atomized targets. We're
leaving it as an option if anyone runs into discrepancies between our
calculation and what jest-runtime calculates for test files within a
project.



## Current Behavior
Jest runtime is used by default and is potentially slow if you use many
transforms, presets, etc. in the jest config.

## Expected Behavior
Jest runtime is not used by default, and users have to option of
enabling it.

## Related Issue(s)
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merged. -->

Fixes #

Author: jaysoo