community, langchain, infra: revert store extended test deps outside of poetry (#19153)

Reverts langchain-ai/langchain#18995

Because it makes installing dependencies in python 3.11 extended testing
take 80 minutes

libs/experimental/extended_requirements.txt

@@ -1,8 +0,0 @@
-presidio-anonymizer
-presidio-analyzer
-faker
-vowpal-wabbit-next
-sentence-transformers
-jinja2
-pandas
-tabulate

libs/experimental/pyproject.toml

@@ -12,6 +12,14 @@ repository = "https://github.com/langchain-ai/langchain"
 python = ">=3.8.1,<4.0"
 langchain-core = "^0.1.31"
 langchain = "^0.1.12"
+presidio-anonymizer = {version = "^2.2.352", optional = true}
+presidio-analyzer = {version = "^2.2.352", optional = true}
+faker = {version = "^19.3.1", optional = true}
+vowpal-wabbit-next = {version = "0.6.0", optional = true}
+sentence-transformers = {version = "^2", optional = true}
+jinja2 = {version = "^3", optional = true}
+pandas = { version = "^2.0.1", optional = true }
+tabulate = {version = "^0.9.0", optional = true}
 
 [tool.poetry.group.lint]
 optional = true
@@ -62,6 +70,21 @@ langchain = {path = "../langchain", develop = true}
 langchain-core = {path = "../core", develop = true}
 langchain-community = {path = "../community", develop = true}
 
+# An extra used to be able to add extended testing.
+# Please use new-line on formatting to make it easier to add new packages without
+# merge-conflicts
+[tool.poetry.extras]
+extended_testing = [
+ "presidio-anonymizer",
+ "presidio-analyzer",
+ "faker",
+ "vowpal-wabbit-next",
+ "sentence-transformers",
+ "jinja2",
+ "pandas",
+ "tabulate",
+]
+
 [tool.ruff.lint]
 select = [
   "E",  # pycodestyle