symphony/orchestration: saner deployment defaults for InstantiationEnv

Do not assume that everything is running from the repo. Finding things
relative to the python script paths is also broken once packages get
installed via pip etc. For now just default to having SimBricks under
/simbricks or else this has to be set in the environment.

symphony/orchestration/simbricks/orchestration/instantiation/base.py

@@ -57,14 +57,12 @@ class InstantiationEnvironment(util_base.IdObj):
 
     def __init__(
         self,
-        repo_path: str = pathlib.Path(__file__).parents[4].resolve(),
-        workdir: str | None = None,
+        workdir: pathlib.Path = pathlib.Path.cwd() / pathlib.Path('simbricks-workdir'),
+        simbricksdir: pathlib.Path = pathlib.Path('/simbricks'),
     ):
         super().__init__()
-        self._repodir: str = pathlib.Path(repo_path).resolve()
-        self._workdir: str = (
-            workdir if workdir else pathlib.Path(f"{self._repodir}/wrkdir").resolve()
-        )
+        self._simbricksdir: str = simbricksdir.resolve()
+        self._workdir: str = workdir.resolve()
         self._output_base: str = pathlib.Path(f"{self._workdir}/output").resolve()
         self._tmp_simulation_files: str = pathlib.Path(f"{self._workdir}/tmp").resolve()
         self._imgdir: str = pathlib.Path(f"{self._tmp_simulation_files}/imgs").resolve()
@@ -407,7 +405,7 @@ class Instantiation():
 
     def join_repo_base(self, relative_path: str) -> str:
         return self._join_paths(
-            base=self.env._repodir, relative_path=relative_path, enforce_existence=True
+            base=self.env._simbricksdir, relative_path=relative_path, enforce_existence=True
         )
 
     def join_output_base(self, relative_path: str) -> str:
@@ -421,7 +419,7 @@ class Instantiation():
         if Instantiation.is_absolute_exists(hd_name_or_path):
             return hd_name_or_path
         path = self._join_paths(
-            base=self.env._repodir,
+            base=self.env._simbricksdir,
             relative_path=f"images/output-{hd_name_or_path}/{hd_name_or_path}",
             enforce_existence=True,
         )