Update Dockerfile

[kartikshastrakar]

•	Updated the PYTORCH_IMAGE to 23.08-py3, but ensure it’s still relevant for your application.
•	The requirements.txt handling avoids potential issues with conflicting torch versions, by removing it from the list before installing.
•	NGC client installation is optimized, and we use MD5 checks to ensure proper download.
•	Reduced Docker image size by cleaning up the apt cache and build files.

Fixes # .

Description

A few sentences describing the changes proposed in this pull request.

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[kartikshastrakar]

•	Updated the PYTORCH_IMAGE to 23.08-py3, but ensure it’s still relevant for your application.
•	The requirements.txt handling avoids potential issues with conflicting torch versions, by removing it from the list before installing.
•	NGC client installation is optimized, and we use MD5 checks to ensure proper download.
•	Reduced Docker image size by cleaning up the apt cache and build files.

[kartikshastrakar]

merg is blocked

[kartikshastrakar]

checked