PT-2340 - Support MySQL 8.4

- Removed runtime.txt after discussion with Anastasia Alexandrova
- Added "use VersionParser" into tests in t/lib when needed
- Removed word master from tests for pt-archiver, pt-config-diff, pt-deadlock-logger, pt-duplicate-key-checker, pt-find, pt-fk-error-logger, pt-heartbeat, pt-index-usage, pt-ioprofile, pt-kill, pt-mysql-summary
- Removed word slave from tests for pt-archiver, pt-config-diff, pt-deadlock-logger, pt-duplicate-key-checker, pt-find, pt-fk-error-logger, pt-heartbeat, pt-index-usage, pt-ioprofile, pt-kill, pt-mysql-summary
- Updated modules for pt-archiver, pt-config-diff, pt-deadlock-logger, pt-duplicate-key-checker, pt-find, pt-fk-error-logger, pt-heartbeat, pt-index-usage, pt-ioprofile, pt-kill, pt-mysql-summary
- Changed mysql_ssl patch, so it is now short option s
- Added a check for existing zombies in t/pt-kill/execute_command.t
- Added bin/pt-galera-log-explainer to .gitignore

t/lib/Cxn.t

@@ -14,6 +14,7 @@ use Test::More;
 use Sandbox;
 use OptionParser;
 use DSNParser;
+use VersionParser;
 use Quoter;
 use PerconaTest;
 use Cxn;
@@ -213,7 +214,7 @@ is_deeply(
       S => undef,
       D => undef,
       t => undef,
-      mysql_ssl => undef,
+      s => undef,
    },
    "cxn->dsn()"
 );
@@ -241,7 +242,7 @@ is_deeply(
       S => undef,
       D => undef,
       t => undef,
-      mysql_ssl => undef,
+      s => undef,
    },
    "Defaults to h=localhost"
 );
@@ -261,7 +262,7 @@ is_deeply(
       S => undef,
       D => undef,
       t => undef,
-      mysql_ssl => undef,
+      s => undef,
    },
    "Default cxn inherits default connection options"
 );