Removes the previously deprecated and unused `tsConfig` option from the
`@nx/jest:jest` executor.
BREAKING CHANGE: The previously deprecated and unused `tsConfig` option
from the `@nx/jest:jest` executor was removed.
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## Current Behavior
<!-- This is the behavior we have today -->
Users migrating from Nx 17 can go up to Nx 20.
## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->
Users migrating from Nx 19 can go up to Nx 21. Users migrating from Nx
17 or 18 should go to Nx 19 first.. then go to Nx 21.
## Related Issue(s)
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merged. -->
Fixes #
Remove the deprecated function `getJestProjects`.
BREAKING CHANGE: The previously deprecated `getJestProjects` function
was removed in favor of `getJestProjectsAsync`.
