[validate-deleted-files-hook] - add logging setup

[GuyAfik]

Description

Add logging setup to validate-deleted-files hook.

[coveralls]

Pull Request Test Coverage Report for Build 7118b4e3-9eb9-44f7-b107-0c630983fc48

Details

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• 6 unchanged lines in 5 files lost coverage.
• Overall coverage remained the same at 80.633%

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Files with Coverage Reduction	New Missed Lines	%
demisto_sdk/commands/common/clients/xsoar/xsoar_api_client.py	1	40.78%
demisto_sdk/commands/common/content/objects/pack_objects/pack_metadata/pack_metadata.py	1	95.64%
demisto_sdk/commands/common/docker_helper.py	1	63.43%
demisto_sdk/commands/common/hook_validations/graph_validator.py	1	24.1%
demisto_sdk/commands/content_graph/objects/content_item.py	2	77.84%

Totals
Change from base Build 1de70fbb-d908-4f97-a73f-fb12554e4a79:	0.0%
Covered Lines:	37146
Relevant Lines:	46068

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💛 - Coveralls