[minor] Add support for various SLS configurations

[rawa-resul]

Description

• Added pandoc-*-x86_64-macOS.pkg to .gitignore as it was missing for macs
• Added requests as an install requirement in setup.py
• Added getNamespace function in ocp.py
• Created new file src/mas/devops/sls.py:
  • Added listSLSInstances function
  • Added findSLSByNamespace function
  • Added verifySLSConnection function (request package used for this function)
• Converted slsLicenseFile to use secretsAPI.create() like the other secrets
  • Also, the secret with the actual license file now gets created within the cli
• Added various optional params for sls in pipelinerun-install.yml.j2
  • sls_entitlement_file
  • sls_tls_crt_local_file_path
  • sls_registration_key
  • sls_url
  • sls_action

Testing

• All of the above have been tested via the CLI