[Ez][BE]: Fix click ImportError in torch/csrc/jit (#153323)

Fixes unnecessary import for torch script. Unblocks #153020 as it appears to fix circular importer linter into importing every Python file under torch

Pull Request resolved: https://github.com/pytorch/pytorch/pull/153323
Approved by: https://github.com/ngimel, https://github.com/cyyever

torch/csrc/jit/tensorexpr/scripts/bisect.py

@@ -2,8 +2,6 @@
 
 import subprocess
 
-import click
-
 
 def test(cmd, limit):
     print(f"Testing PYTORCH_JIT_OPT_LIMIT=tensorexpr_fuser={limit} {cmd}")
@@ -26,8 +24,6 @@ def test(cmd, limit):
     return 0
 
 
-@click.command()
-@click.option("--cmd")
 def bisect(cmd):
     last_good = 0
     first_bad = 10000
@@ -69,4 +65,11 @@ def bisect(cmd):
 
 
 if __name__ == "__main__":
-    bisect()
+    import click
+
+    @click.command()
+    @click.option("--cmd", required=True)
+    def cli(cmd):
+        bisect(cmd)
+
+    cli()