Support building against Percona Server builds of MySQL client library libperconaserverclient

[nattofriends]

After #584, pkg-config is required.

I use Percona Server for MySQL, and use both the server as well as their client library. Percona Server for MySQL began shipping a .pc file in percona/percona-server#5215 Percona Server for MySQL 8.0.37, but the library name they ship is perconaserverclient:

$ pkg-config --exists perconaserverclient
$ echo $?
0
$ pkg-config --cflags perconaserverclient
-I/usr/include/mysql
$ pkg-config --libs perconaserverclient
-lperconaserverclient

This PR adds support for that name to pkg-config invocations.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.86%. Comparing base (e2a908b) to head (0571d0a).
Report is 10 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #718   +/-   ##
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  Coverage   88.86%   88.86%           
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  Files           7        7           
  Lines         548      548           
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  Hits          487      487           
  Misses         61       61           

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