[test] Use Path.absolute instead of Path.resolve

... since the file could be symlinked and directory structure
might not be preserved.

Change-Id: If7f87d4b51c1812aa388f189c602a1a69c35ec95
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4694641
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Auto-Submit: Victor Gomes <victorgomes@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/main@{#89004}

tools/testrunner/base_runner.py

@@ -123,7 +123,7 @@ class TestRunnerError(Exception):
 
 class BaseTestRunner(object):
   def __init__(self, basedir=None):
-    self.v8_root = Path(__file__).resolve().parent.parent.parent
+    self.v8_root = Path(__file__).absolute().parent.parent.parent
     self.basedir = Path(basedir or self.v8_root)
     self.outdir = None
     self.build_config = None