Use tls plugin for old binaries < 5.2.0

This fixes restart tests from old binaries < 5.2.0, which previously
were immediately crashing in a TLS codepath. This behavior was not
originally ported from the old test harness to the new test harness.

contrib/TestHarness2/test_harness/config.py

@@ -139,6 +139,8 @@ class Config:
         self.max_errors_args = {'short_name': 'E'}
         self.old_binaries_path: Path = Path('/app/deploy/global_data/oldBinaries/')
         self.old_binaries_path_args = {'help': 'Path to the directory containing the old fdb binaries'}
+        self.tls_plugin_path: Path = Path('/app/deploy/runtime/.tls_5_1/FDBLibTLS.so')
+        self.tls_plugin_path_args = {'help': 'Path to the tls plugin used for binaries < 5.2.0'}
         self.use_valgrind: bool = False
         self.use_valgrind_args = {'action': 'store_true'}
         self.buggify = BuggifyOption('random')

contrib/TestHarness2/test_harness/run.py

@@ -18,7 +18,7 @@ from functools import total_ordering
 from pathlib import Path
 from test_harness.version import Version
 from test_harness.config import config
-from typing import List, Pattern, OrderedDict
+from typing import Dict, List, Pattern, OrderedDict
 
 from test_harness.summarize import Summary, SummaryTree
 
@@ -309,6 +309,7 @@ class TestRun:
         self.trace_format: str | None = config.trace_format
         if Version.of_binary(self.binary) < "6.1.0":
             self.trace_format = None
+        self.use_tls_plugin = Version.of_binary(self.binary) < "5.2.0"
         self.temp_path = config.run_dir / str(self.uid)
         # state for the run
         self.retryable_error: bool = False
@@ -332,6 +333,7 @@ class TestRun:
 
     def run(self):
         command: List[str] = []
+        env: Dict[str, str] = os.environ.copy()
         valgrind_file: Path | None = None
         if self.use_valgrind:
             command.append('valgrind')
@@ -346,6 +348,9 @@ class TestRun:
                     '-s', str(self.random_seed)]
         if self.trace_format is not None:
             command += ['--trace_format', self.trace_format]
+        if self.use_tls_plugin:
+            command += ['--tls_plugin', str(config.tls_plugin_path)]
+            env["FDB_TLS_PLUGIN"] = str(config.tls_plugin_path)
         if Version.of_binary(self.binary) >= '7.1.0':
             command += ['-fi', 'on' if self.fault_injection_enabled else 'off']
         if self.restarting:
@@ -361,7 +366,7 @@ class TestRun:
         resources = ResourceMonitor()
         resources.start()
         process = subprocess.Popen(command, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE, cwd=self.temp_path,
-                                   text=True)
+                                   text=True, env=env)
         did_kill = False
         timeout = 20 * config.kill_seconds if self.use_valgrind else config.kill_seconds
         err_out: str