[Documentation] Updates to NVIDIA Playground/Foundation Model naming.… (#14770)

…  (#14723)

- **Description:** Minor updates per marketing requests. Namely, name
decisions (AI Foundation Models / AI Playground)
  - **Tag maintainer:** @hinthornw 

Do want to pass around the PR for a bit and ask a few more marketing
questions before merge, but just want to make sure I'm not working in a
vacuum. No major changes to code functionality intended; the PR should
be for documentation and only minor tweaks.

Note: QA model is a bit borked across staging/prod right now. Relevant
teams have been informed and are looking into it, and I'm placeholdered
the response to that of a working version in the notebook.

Co-authored-by: Vadim Kudlay <32310964+VKudlay@users.noreply.github.com>

.github/scripts/check_diff.py

@@ -1,5 +1,6 @@
 import json
 import sys
+import os
 
 LANGCHAIN_DIRS = {
     "libs/core",
@@ -30,9 +31,15 @@ if __name__ == "__main__":
             )
         elif "libs/partners" in file:
             partner_dir = file.split("/")[2]
-            dirs_to_run.update(
-                (f"libs/partners/{partner_dir}", "libs/langchain", "libs/experimental")
-            )
+            if os.path.isdir(f"libs/partners/{partner_dir}"):
+                dirs_to_run.update(
+                    (
+                        f"libs/partners/{partner_dir}",
+                        "libs/langchain",
+                        "libs/experimental",
+                    )
+                )
+            # Skip if the directory was deleted
         elif "libs/langchain" in file:
             dirs_to_run.update(("libs/langchain", "libs/experimental"))
         elif "libs/experimental" in file: