Include public certificates in collect tarball to assist with issue investigation

[Michel Thebeau [WIND]]

Brief Description
-----------------
The collect bundle omits certificate information needed for issue resolution

Severity
--------
Provide the severity of the defect.
Minor

Steps to Reproduce
------------------
run 'collect', and examine the result tarball

Expected Behavior
------------------
Certificates relevant for an issue can be found in collect bundle

Actual Behavior
----------------
Some certificates are present in bundle, but others are omitted.

Reproducibility
---------------
100%

System Configuration
--------------------
Any/All

Branch/Pull Time/Commit
-----------------------
master branch

Last Pass
---------
N/A

Timestamp/Logs
--------------
N/A

Test Activity
-------------
Other - defect resolution

Workaround
----------
Direct access to the cluster

[Michel Thebeau [WIND] (mthebeau)]

WIP review:

https://review.opendev.org/c/starlingx/utilities/+/890247

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/utilities/+/890247
Committed: https://opendev.org/starlingx/utilities/commit/50c17f8e570d69fe4b770e42d027b5106a3c5d7e
Submitter: "Zuul (22348)"
Branch: master

commit 50c17f8e570d69fe4b770e42d027b5106a3c5d7e
Author: Michel Thebeau <email address hidden>
Date: Thu Jul 27 20:29:29 2023 +0000

    collector: add collect of certificates

    Add explicit collect of certificates files for the platform.

    Delete all crt, pem and key files in collect before including those
    files explicitly listed in certs.include file. Use openssl command to
    omit all but certificate information from the files.

    Test Plan:
    PASS AIO-SX, AIO-DX+, DC with AIO-SX subcloud
    PASS options --skip-mask, --omit-certs, --subcloud
    PASS bashate
    PASS unit test for collect_certificates
    PASS collect output contains no crt, pem and key files except those
          listed in certs.include
    PASS If a file listed in certs.include does not exist on the filesystem
          then the absence is ignored - it is ok for a specified file not to
          exist.
    PASS file with key omits key - only certs are copied
    PASS manual verify of file paths (including those on DC subcloud)

    Closes-Bug: 2029302

    Change-Id: I9fafe5fde39a1a7de9a887424f274986b13e053a
    Signed-off-by: Michel Thebeau <email address hidden>