Feat(eos_designs): Add missing schemas for eos_designs

[Vibhu-gslab]

Change Summary

Add schemas with 1:1 models from the eos_cli_config_gen schema:

1. event_monitor
2. load_interval
3. service_unsupported_transceiver
4. queue_monitor_streaming

Related Issue(s)

Fixes #4746

Component(s) name

arista.avd.eos_designs

Proposed changes

Added schemas in eos_designs and modified the required code.

Checklist

Repository Checklist

• My code has been rebased from devel before I start
• I have read the CONTRIBUTING document.
• My change requires a change to the documentation and documentation have been updated accordingly.
• I have updated molecule CI testing accordingly. (check the box if not applicable)

[github-actions]

Review docs on Read the Docs

To test this pull request:

# Create virtual environment for this testing below the current directory
python -m venv test-avd-pr-4840
# Activate the virtual environment
source test-avd-pr-4840/bin/activate
# Install all requirements including PyAVD
pip install "pyavd[ansible] @ git+https://github.com/Vibhu-gslab/avd.git@missing_schemas_4746#subdirectory=python-avd" --force
# Point Ansible collections path to the Python virtual environment
export ANSIBLE_COLLECTIONS_PATH=$VIRTUAL_ENV/ansible_collections
# Install Ansible collection
ansible-galaxy collection install git+https://github.com/Vibhu-gslab/avd.git#/ansible_collections/arista/avd/,missing_schemas_4746 --force
# Optional: Install AVD examples
cd test-avd-pr-4840
ansible-playbook arista.avd.install_examples

[MaheshGSLAB]

LGTM