remove CVEs (#8092)

This PR aims to move all code with CVEs into `langchain.experimental`.
Note that we are NOT yet removing from the core `langchain` package - we
will give people a week to migrate here.

See MIGRATE.md for how to migrate

Zero changes to functionality

Vulnerabilities this addresses:

PALChain:
- https://security.snyk.io/vuln/SNYK-PYTHON-LANGCHAIN-5752409
- https://security.snyk.io/vuln/SNYK-PYTHON-LANGCHAIN-5759265

SQLDatabaseChain
- https://security.snyk.io/vuln/SNYK-PYTHON-LANGCHAIN-5759268

`load_prompt` (Python files only)
- https://security.snyk.io/vuln/SNYK-PYTHON-LANGCHAIN-5725807

libs/experimental/langchain_experimental/cpal/templates/univariate/intervention.py

@@ -1,59 +0,0 @@
-# flake8: noqa E501
-
-# fmt: off
-template = (
-    """
-Transform the hypothetical whatif statement into JSON. Don't guess at any of the parts. Write NONE if you are unsure.
-
-{format_instructions}
-
-
-
-statement: if cindy's pet count was 4
-
-
-
-
-# JSON:
-
-
-
-{{
-    "entity_settings" : [
-        {{ "name": "cindy", "attribute": "pet_count", "value": "4" }}
-    ]
-}}
-
-
-
-
-
-statement: Let's say boris has ten dollars and Bill has 20 dollars.
-
-
-
-
-# JSON:
-
-
-{{
-    "entity_settings" : [
-        {{ "name": "boris", "attribute": "dollars", "value": "10" }},
-        {{ "name": "bill", "attribute": "dollars", "value": "20" }}
-    ]
-}}
-
-
-
-
-
-Statement: {narrative_input}
-
-
-
-
-# JSON:
-""".strip()
-    + "\n\n\n"
-)
-# fmt: on