Upgrade Assurance new incident layout dynamic inputs for checks

[alperenkose]

Description

This PR provides enhancements on the Upgrade Assurance new incident layout.

• Test inputs for optional checks are now displayed automatically if relevant test is selected in the check list. All needed checks must be selected now in the check list (e.g. arp should be selected to display arp_entry_exists input).
• if the checks has a required input and it's not filled in, the test is silently skipped.
• If the check has an optional input, it's run even if the optional input is not provided. (e.g. content_version is checked against the latest available content version if min_content_version input is not provided, otherwise it's compared with the provided version)
• Added input incident fields for dpmpclockdiff and ipsectunnel to the Assurance Test new incident layout.

Additionally following tests added in Assurance Test incident layout readiness check list to the selections:

• active_support
• content_version
• session_exist
• ipsec_tunnel
• dp_mp_clock_diff

String quotation marks use is also standardized to single quote (') in PAN_OS_Upgrade_Assurance.py on this PR, unless it contains another single quote or in a human message form.

Motivation and Context

Check list and input fields were causing some confusion whether they are activated when not available in the checks. Also some checks like content_version with optional inputs was not possible to activate without providing a value. This PR focuses on these changes.

How Has This Been Tested?

Tested on vm-series firewalls.

Screenshots (if appropriate)

Types of changes

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes if appropriate.
• All new and existing tests passed.

[adambaumeister]

These changes make sense to me. Great work making this so nicely integrated into the rest of the content.