* Update TLS ciphers and protocols for JDK 11 (elastic#41385)

This commit updates the default ciphers and TLS protocols that are used
after the minimum supported JDK is JDK 11. The conditionals around
TLSv1.3 and 256-bit cipher support have been removed. JDK 11 no longer
requires an unlimited JCE policy file for 256 bit cipher support and
TLSv1.3 is supported in JDK 11+. New cipher support has been introduced
in the newer JDK versions as well. The ciphers are ordered with PFS
ciphers being most preferred, then AEAD ciphers, and finally those with
mainstream hardware support.

* Fixes for TLSv1.3 on JDK11

* fix for JDK-8212885

…tic#41893)

The class was called PatternSeenEventExcpectation. This commit
is a straight class rename to correct the spelling.

This commit adds deletion of the bin directory to postrm cleanup. While
the package's bin files are cleaned up by the package manager, plugins
may have created subdirectories under bin. We already cleanup plugins,
but not the extra bin dirs their installation created.

closes elastic#18109