fix: local deployment setup

[Priyanka-Microsoft]

Purpose

• ...
  This pull request updates the local development setup documentation and Azure configuration to simplify Python dependency management and clarify instructions for developers. The main focus is on consolidating dependency installation for backend and batch functions, and making minor adjustments to configuration requirements.

Documentation improvements:

• Updated the backend dependency installation steps in docs/LocalDevelopmentSetup.md to clarify that both backend and batch functions share dependencies managed by the root pyproject.toml, eliminating the need for separate installation steps for the batch function. Also, added a note to make this explicit.
• Removed redundant instructions for installing batch function dependencies in the environment setup section of the documentation, further reinforcing the consolidated dependency management.

Configuration update:

• Removed the explicit bicep version requirement from the azure.yaml configuration, potentially allowing for greater flexibility in tool versions.

Does this introduce a breaking change?

• Yes
• No

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

What to Check

Verify that the following are valid

• ...

Other Information