CDRIVER-4468 revert additional ccache checks

[kevinAlbs]

Summary

• Revert changes of Do not elide find_package() if MONGO_USE_CCACHE is set #1031 and Disable ccache by default for versions older than 3.4.3 #1029.

Background & Motivation

The changes appear to introduce a regression building on macOS:

-- Found ccache: /usr/local/bin/ccache
ccache: invalid option -- n
CMake Error at build/cmake/CCache.cmake:28 (string):
  string sub-command REGEX, mode MATCH needs at least 5 arguments total to
  command.
Call Stack (most recent call first):
  CMakeLists.txt:86 (include)

This was noticed during an attempt to prepare a release for 1.23.0. I had not noticed before since I was configuring with MONGO_USE_CCACHE=ON.

This comment has additional details.

The fix is not obvious to me. Since these are improvements intended for stability in Evergreen, I want to revert to unblock the 1.23.0 release for today.