bf: SPRXCLT-20 handle 404 error appropriately

[jonathan-gramain]

• turn error log into a debug log

• remove flag 'retryable' from the returned error object, as 404 is inherently not retryable

Also main request/response log messages are now more generic as they should be.

[bert-e]

Hello jonathan-gramain,

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[bert-e]

Waiting for approval

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• the author

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[jonathan-gramain]

/approve

[bert-e]

I have successfully merged the changeset of this pull request
into targetted development branches:

• ✔️ development/8.1

The following branches have NOT changed:

• development/6.4
• development/7.10
• development/7.4
• development/8.0

Please check the status of the associated issue SPRXCLT-20.

Goodbye jonathan-gramain.

The following options are set: approve