Update HTML report plugin to add a Note column for subresults

[matusmarhefka]

Currently, when using result:respect (https://tmt.readthedocs.io/en/stable/spec/tests.html#spec-tests-result), the TMT HTML report doesn't display a Note column for subresults from tmt-report-results.yaml (file that the tmt-report-result command writes to). Only Result, Name and Logs columns are present (

tmt/tmt/steps/report/html/template.html.j2

Lines 333 to 351 in 8f1cbe3

	<thead>
	<tr>
	<th>Result</th>
	<th>Name</th>
	<th>Logs</th>
	</tr>
	</thead>
	{% for subresult in result.subresult %}
	<tr>
	<td class="result {{ subresult.result.value | e }}">{{ subresult.result.value | e }}</td>
	<td class="name">{{ subresult.name | e }}</td>
	<td class="log">
	{% for log in subresult.log %}
	<a href="{{ base_dir | linkable_path | urlencode }}/{{ log | urlencode }}">{{ log | basename }}</a>
	{% else %}
	-
	{% endfor %}
	</td>
	</tr>

). Please extend the HTML template to also include Note column, we use it to provide more details for the subresults and we want to migrate away from using result:custom.

The following moved in #4573 as it represents another feature request:

Also it seems that the main test result's Note column content can't be modified when using result:respect. Would it be possible to either extend tmt-report-result to accept a note as an argument which would be added to the main result or provide some other mean for that, for example, using a special name: / subresult (as for result:custom)?