Log file messages regrading downloads are misleading

[bryank-cs]

The following log messages say that the file being downloaded failed and won't be retried, but then downloads it from another source:

== 2024-06-12 08:26:39,560 filetools.py:832 WARNING URL https://files.pythonhosted.org/packages/cc/1f/676fc9e29c68e9c39c6dadf150ab4e5bf4907de4b9afd2bc6e0afd24ab7c/easybuild_easyblocks-4.9.2.tar.gz was not found (HTTP response code 404), not trying again
== 2024-06-12 08:26:39,562 filetools.py:859 WARNING Download of https://files.pythonhosted.org/packages/cc/1f/676fc9e29c68e9c39c6dadf150ab4e5bf4907de4b9afd2bc6e0afd24ab7c/easybuild_easyblocks-4.9.2.tar.gz to /opt/sources/e/EasyBuild/easybuild_easyblocks-4.9.2.tar.gz failed, done trying
== 2024-06-12 08:26:39,647 filetools.py:816 INFO File size for https://files.pythonhosted.org/packages/5d/85/e8593ceeb00c61253204e74d2a8360076ce016f42d83d33841f8e7de57a1/easybuild_easyblocks-4.9.2.tar.gz: 598689
== 2024-06-12 08:26:39,651 filetools.py:270 INFO Not showing progress bar for downloading small file (size 598689)
== 2024-06-12 08:26:39,924 filetools.py:823 INFO Downloaded file easybuild_easyblocks-4.9.2.tar.gz from url https://files.pythonhosted.org/packages/5d/85/e8593ceeb00c61253204e74d2a8360076ce016f42d83d33841f8e7de57a1/easybuild_easyblocks-4.9.2.tar.gz to /opt/sources/e/EasyBuild/easybuild_easyblocks-4.9.2.tar.gz
== 2024-06-12 08:26:39,925 filetools.py:855 INFO Successful download of file easybuild_easyblocks-4.9.2.tar.gz from url https://files.pythonhosted.org/packages/5d/85/e8593ceeb00c61253204e74d2a8360076ce016f42d83d33841f8e7de57a1/easybuild_easyblocks-4.9.2.tar.gz to path /opt/sources/e/EasyBuild/easybuild_easyblocks-4.9.2.tar.gz
== 2024-06-12 08:26:39,925 easyblock.py:951 INFO Successfully downloaded source file easybuild_easyblocks-4.9.2.tar.gz from https://files.pythonhosted.org/packages/5d/85/e8593ceeb00c61253204e74d2a8360076ce016f42d83d33841f8e7de57a1/easybuild_easyblocks-4.9.2.tar.gz

This is from the EasyBuild-4.9.2.eb that is automatically generated using --install-latest with:

source_urls = [
    # %(namelower)s-framework
    'https://files.pythonhosted.org/packages/cc/1f/676fc9e29c68e9c39c6dadf150ab4e5bf4907de4b9afd2bc6e0afd24ab7c/',
    # %(namelower)s-easyblocks
    'https://files.pythonhosted.org/packages/5d/85/e8593ceeb00c61253204e74d2a8360076ce016f42d83d33841f8e7de57a1/',
    # %(namelower)s-easyconfigs
    'https://files.pythonhosted.org/packages/99/b2/d899b4310bc54a10e0fb46995a2abc333857db16d116f22a53b0313d13d7/',
]
sources = [
    'easybuild_framework-%(version)s.tar.gz',
    'easybuild_easyblocks-%(version)s.tar.gz',
    'easybuild_easyconfigs-%(version)s.tar.gz',
]

It could be generated using a sources syntax that associates the correct URL for each file.

In other cases with multiple source urls, the log messages should be written to clarify it will retry with a different URL, if possible. Or maybe change the log levels to show successful downloads only, and all the failures only if none worked.