Add opt-in support to read ansible-navigator configuration from configuration file path

[ganeshrn]

Problem

Allow ansible-language-server to read ansible-navigator config file options to reduce duplicating config value setting for ansible-navigator users.

Solution

Read execution-environment related configuration options from ansible-navigator configuration file path.
Current overlap options between client and navigator are

    "ansible.executionEnvironment.enabled": false,
    "ansible.executionEnvironment.containerEngine": "auto",
    "ansible.executionEnvironment.image": "quay.io/ansible/ansible-navigator-demo-ee:0.6.0",
    "ansible.executionEnvironment.pullPolicy": "missing",

If navigator config file path is set by user the config will take precedence over corresponding client settings

Alternatives

No response

Additional context

No response