Add lakebase autoscaling to e2e agent integration tests

[jennsun]

ran lakebase tests locally using my own credentials

cd /Users/jenny.sun/app-templates/.scripts/agent-integration-tests && rm -rf .pytest_cache __pycache__ && uv run pytest test_e2e.py -v -s -n 0 --skip-deploy --profile e2-dogfood --lakebase-provisioned-name jenny-test --lakebase-autoscaling-project j-autoscaling3 --lakebase-autoscaling-branch longtermapp

and all tests except openai-agents-sdkj-multigant passed (due to lakebase-unrelated PERMISSION_DENIED error)
manually:

summary by claude:

with deploy:

cd /Users/jenny.sun/app-templates/.scripts/agent-integration-tests && uv run pytest test_e2e.py -v -s -n 0 --skip-local --profile e2-dogfood --lakebase-autoscaling-project j-autoscaling3 --lakebase-autoscaling-branch longtermapp --template agent-langgraph-short-term-memory --template agent-langgraph-long-term-memory --template agent-openai-agents-sdk-short-term-memory

will be helpful to have another runthrough with bryan's credentials he's been using to test integration tests

[jennsun]

from https://databricks-sdk-py.readthedocs.io/en/latest/dbdataclasses/apps.html#databricks.sdk.service.apps.AppResourcePostgres

[jennsun]

should combine from templates.py in overall scripts folder instead of having 2 separate sources of truth