[docker] Fix issue with push images

[mmhw]

Description

Fixed an issue where pushing a Docker image to a Docker registry incorrectly returned a success message despite the operation failing.

[github-actions]

Changelog(s) in markdown:

• Fixed an issue where pushing a Docker image to a Docker registry incorrectly returned a success message despite the operation failing. #4825

[guardrails]

⚠️ We detected 1 security issue in this pull request:

Insecure Use of Crypto (1)

Severity	Details	Docs
Low	Title: Insecure hash functions demisto-sdk/demisto_sdk/commands/common/docker_helper.py Line 535 in 5ba554e "\n".join(sorted(set(pip_requirements))).encode("utf-8")	📚

More info on how to fix Insecure Use of Crypto in Python.

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