Aligned normal_lccdf and std_normal_lccdf with the lcdf functions

[jaburgoyne]

Summary

This pull request addresses #1985 by updating normal_lccdf and std_normal_lccdf to call normal_lcdf and std_normal_lcdf with the signs of x and mu reversed.

Tests

The tests have been updated to use the latest values of pnorm in R 4.6.1. These are more direct tests than the previous versions, which worked via an exp call, somewhat defeating the purpose of having separate lcdf and lccdf functions.

Side Effects

None.

Release notes

normal_lccdf and std_normal_lccdf updated to use normal_lcdf and std_normal_lcdf implementations

Checklist

• Copyright holder: John Ashley Burgoyne

  The copyright holder is typically you or your assignee, such as a university or company. By submitting this pull request, the copyright holder is agreeing to the license the submitted work under the following licenses:
  - Code: BSD 3-clause (https://opensource.org/licenses/BSD-3-Clause)
  - Documentation: CC-BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

• the basic tests are passing

  • unit tests pass (to run, use: ./runTests.py test/unit)
  • header checks pass, (make test-headers)
  • dependencies checks pass, (make test-math-dependencies)
  • docs build, (make doxygen)
  • code passes the built in C++ standards checks (make cpplint)

• the code is written in idiomatic C++ and changes are documented in the doxygen

• the new changes are tested

[SteveBronder]

Fyi our backend CI is migrating to a new server cluster so the jenkins will hiccup for a minute while we get everything settled