remove unsupported `end` from ami logs and remove MultilineLogger

jwst.associations.lib.log_config globally sets the logging class to MultilineLogger which can cause seemingly unrelated tests to fail: https://github.com/spacetelescope/stpipe/actions/runs/9445531594/job/26087417184#step:10:189

The failure revealed a bug in the ami log messages (end is not a supported kwarg for these calls).

This PR also removes MultilineLogger and the global call to setLoggerClass.

This class was added in the "inital commit": https://github.com/spacetelescope/jwst/commit/5915b0e919be1e3393fd0ba74ff9106de77a4a1e#diff-9e38d1ac7b11ff469184d069a47776082c49c376e91e3b8dbb9e3b3872a6627bR177 and will change other logging if the association module is imported. For example:

import jwst.associations.lib.log_config
import logging

logger = logging.getLogger("foo")
logger.warning("bam\nbar")

produces:

2024-06-15 12:58:48,873 - stpipe - WARNING - bam
2024-06-15 12:58:48,873 - stpipe - WARNING - bar

removing import jwst.associations.lib.log_config produces:

bam
bar

(note the rather extensive log formatting that stpipe introduces, this is not part of this PR). With this PR the output (with the jwst.association.lib.log_config) is:

2024-06-15 13:00:52,386 - stpipe - WARNING - bam
bar

(and the same if jwst.associations.lib.log_config is not imported).

Fixes https://github.com/spacetelescope/jwst/issues/6407 and is an alternative to https://github.com/spacetelescope/jwst/pull/7616

Regression tests running at: https://plwishmaster.stsci.edu:8081/job/RT/job/JWST-Developers-Pull-Requests/1534/

Checklist for PR authors (skip items if you don't have permissions or they are not applicable)

[x] added entry in CHANGES.rst within the relevant release section
[ ] updated or added relevant tests
[ ] updated relevant documentation
[ ] added relevant milestone
[x] added relevant label(s)
[ ] ran regression tests, post a link to the Jenkins job below. How to run regression tests on a PR
[ ] All comments are resolved
[ ] Make sure the JIRA ticket is resolved properly

spacetelescope / jwst

remove unsupported `end` from ami logs and remove MultilineLogger #8550

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