Merge error code lists into one page (Fixes #20077)

.readthedocs.yaml

@@ -1,6 +1,7 @@
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
-
+# Documentation on Read the Docs is intended to be built from released
+# git tags to support versioned documentation.
 version: 2
 
 build:

docs/source/conf.py

@@ -79,7 +79,13 @@
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
-exclude_patterns = []
+exclude_patterns = [
+    "build",
+    "Thumbs.db",
+    ".DS_Store",
+    "error_code_list.rst",
+    "error_code_list2.rst",
+]
 
 # The reST default role (used for this markup: `text`) to use for all
 # documents.