Remove cudf::test::print calls from libcudf gtests

[davidwendt]

Description

Removes unneeded calls to cudf::test::print and std::printf in libcudf gtests source code.
Some of these were found in the build log while diagnosing a CI build failure.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (branch-23.04@d715ac8). Click here to learn what that means.
Patch has no changes to coverable lines.

Additional details and impacted files

@@               Coverage Diff               @@
##             branch-23.04   #12604   +/-   ##
===============================================
  Coverage                ?   85.82%           
===============================================
  Files                   ?      158           
  Lines                   ?    25184           
  Branches                ?        0           
===============================================
  Hits                    ?    21614           
  Misses                  ?     3570           
  Partials                ?        0           

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[vyasr]

/merge