Update Azure terraform config

[neatdecisions]

Description

Update the terraform config for Azure:

• stop overriding container's commands (the default config URL was wrong);
• propagate environment_variables and set ENABLE_PRIMITIVE: false.

Fixes # (issue)
Now terraform deployment for Azure can be launched right away without the need of configuration update, and disables primitive jobs by default (complementing #428)

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Documentation update

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

To test ENABLE_PRIMITIVE=false:

• Test A: run terraform apply with the corrected config but without the environment variable setting: the number of jobs launched for 195.189.222.1:53 is 44 (as per current config: 22 TCP+22 UDP)
• Test B: run terraform apply with the corrected config and with the environment variable setting (as in the PR): the number of jobs launched for 195.189.222.1:53 is 22 (as per current config: 22 TCP only) + "There is a filter defined for a job but this client doesn't pass it - skip the job" message in the logs.

Test Configuration

• Release version: 0.8.4
• Platform: Azure container instances

Screenshots