[SBProgress] Add swig support for with statement in Python (llvm#133527)

We recently added an explicit finalize to SBProgress, llvm#128966. I
realized while adding some additional implementations of SBProgress that
we should to add `with` support for ease of use. This patch addresses
adding and `__enter()__` method (which a no-op) and an `__exit()__` to
swig. I also refactor the emitter for the test to leverage `with`
instead of explicitly calling finalize, and I've updated the docstrings.

Author: Jlalond

lldb/bindings/interface/SBProgressDocstrings.i

@@ -46,12 +46,19 @@ rely on the garbage collection when using lldb.SBProgress.
 
 Non-deterministic progresses behave the same, but omit the total in the constructor. ::
 
-    non_deterministic_progress = lldb.SBProgress('Non deterministic progress, 'Detail', lldb.SBDebugger)
+    non_deterministic_progress = lldb.SBProgress('Non deterministic progress', 'Detail', lldb.SBDebugger)
     for i in range(10):
         non_deterministic_progress.Increment(1)
     # Explicitly send a progressEnd, otherwise this will be sent
     # when the python runtime cleans up this object.
     non_deterministic_progress.Finalize()
+
+Additionally for Python, progress is supported in a with statement. ::
+    with lldb.SBProgress('Non deterministic progress', 'Detail', lldb.SBDebugger) as progress:
+        for i in range(10):
+            progress.Increment(1)
+    # The progress object is automatically finalized when the with statement
+
 ") lldb::SBProgress;    
 
 %feature("docstring",

lldb/bindings/interface/SBProgressExtensions.i

@@ -0,0 +1,13 @@
+%extend lldb::SBProgress {
+#ifdef SWIGPYTHON
+    %pythoncode %{
+        def __enter__(self):
+            '''No-op for with statement'''
+            pass
+
+        def __exit__(self, exc_type, exc_value, traceback):
+            '''Finalize the progress object'''
+            self.Finalize()
+    %}
+#endif
+}

lldb/bindings/interfaces.swig

@@ -200,6 +200,7 @@
 %include "./interface/SBModuleSpecExtensions.i"
 %include "./interface/SBModuleSpecListExtensions.i"
 %include "./interface/SBProcessExtensions.i"
+%include "./interface/SBProgressExtensions.i"
 %include "./interface/SBProcessInfoListExtensions.i"
 %include "./interface/SBQueueItemExtensions.i"
 %include "./interface/SBScriptObjectExtensions.i"

lldb/test/API/tools/lldb-dap/progress/Progress_emitter.py

@@ -88,21 +88,18 @@ def __call__(self, debugger, command, exe_ctx, result):
             progress = lldb.SBProgress(
                 "Progress tester", "Initial Detail", total, debugger
             )
-
         # Check to see if total is set to None to indicate an indeterminate progress
         # then default to 10 steps.
-        if total is None:
-            total = 10
-
-        for i in range(1, total):
-            if cmd_options.no_details:
-                progress.Increment(1)
-            else:
-                progress.Increment(1, f"Step {i}")
-            time.sleep(cmd_options.seconds)
-
-        # Not required for deterministic progress, but required for indeterminate progress.
-        progress.Finalize()
+        with progress:
+            if total is None:
+                total = 10
+
+            for i in range(1, total):
+                if cmd_options.no_details:
+                    progress.Increment(1)
+                else:
+                    progress.Increment(1, f"Step {i}")
+                time.sleep(cmd_options.seconds)
 
 
 def __lldb_init_module(debugger, dict):