Colors code on summary should not be printed

[neilprosser]

Issue details

Related to #1228. I'm seeing color-related characters in the GitHub step summary when color: always and comment-on-summary: true are both set.

The action allows to enable color with auto (default), raw, never and always.
The action allows to show a comment-on-summary for an update.

It's not possible to enable colors only for the GHA output:

1. enable color: always
2. the preview/output in the "Actions" github page is shown with colors
3. the output in the summary of the check contains color and escape codes

Should be fair to allow colors only for the "Actions" pulumi output and not in the comment of the PR.

Affected area/feature

Pulumi output/colors