Fix non-relevant error messages in fm-manager.log

[Fabrizio Perez]

Brief Description
-----------------
fm-manager.log has a log "non-relevant" error message. This prevent analysis for this file.

In fm-manager.log there are a lot of message like,
2023-03-02T14:50:40.376 fmMsgServer.cpp(508): Deleted alarm failed: (100.105) (fs_name=image-conversion) (FM_ERR_ENTITY_NOT_FOUND)
2023-03-02T14:50:40.376 fmMsgServer.cpp(511): Response to delete fault: 10

WRCP never has a image-conversion partition, so this error message is irrelevant and should not be out to the log.

Severity
--------
minor. System usable

Steps to Reproduce
------------------
tail -f /var/log/fm-manager.log

Expected Behavior
------------------
Log file just showing relevant errors

Actual Behavior
----------------
Log file is filled with these messages, doing
hard the debug task

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

System Configuration
--------------------
Not SX

Branch/Pull Time/Commit
-----------------------
Master

Timestamp/Logs
--------------

Test Activity
-------------
Build

Workaround
----------

[OpenStack Infra (hudson-openstack)]

Change abandoned by "Fabrizio Perez <email address hidden>" on branch: master
Review: https://review.opendev.org/c/starlingx/fault/+/888328
Reason: Moved to https://review.opendev.org/c/starlingx/config/+/890168

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.opendev.org/c/starlingx/config/+/890168
Committed: https://opendev.org/starlingx/config/commit/6abe5f305264137e6fdfe36475db74dec094334c
Submitter: "Zuul (22348)"
Branch: master

commit 6abe5f305264137e6fdfe36475db74dec094334c
Author: fperez <email address hidden>
Date: Mon Jul 31 20:39:25 2023 -0300

    Fix non-relevant error messages in fm-manager.log

    This commit aims to remove unnecessary messages in fm
    logs.
    With this change, the periodic task will avoid calling
    clear_fault unnecessary every time.
    This commit also removes call to clear_fault when
    image-conversion is not configured.

    Test plan:
    PASS: Build and install sysinv pkg.
          Verify that the delete errors messages are not
          present anymore.
    PASS: Check sysinv logs to verify expected behavior.

    Closes-bug: 2027622

    Signed-off-by: fperez <email address hidden>
    Change-Id: I3103bb3ea4c7cc588f4b352bbf6e0e557fda2a05