issue: 3898040 DOCA RX Data Path

[AlexanderGrissik]

Description

1. DOCA RX Data Path
2. Changes in epoll os events handling
3. Some cleanups

What

1. This PR is based on PR 158.
2. It implements DOCA RX Data Path regular RQ including notification mechanism.
3. It integrates CQ moderation and MSIX affinity DOCA features.
4. In addition, it removes internal thread involvment in OS events handling for epoll. This improves performance and avoids lock contentions. Now OS polling will be done the same as it was for poll/select. i.e Polling each every loops or epolls for OS events depending on the configuration.
5. Obsolete and unneeded flags cleanup.

Why ?

DOCA integration

Change type

What kind of change does this PR introduce?

• [ ] Bugfix
• [X] Feature
• [ ] Code style update
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [ ] Documentation content changes
• [ ] Tests
• [ ] Other

Check list

• [X] Code follows the style de facto guidelines of this project
• [X] Comments have been inserted in hard to understand places
• [X] Documentation has been updated (if necessary)
• [ ] Test has been added (if possible)