'admin log' add log level print and support filter by log level

[dormanze]

Community Contribution License

All community contributions in this pull request are licensed to the project maintainers
under the terms of the Apache 2 license.
By creating this pull request I represent that I have the right to license the
contributions to the project maintainers under the Apache 2 license.

Description

'admin log' print many event log such as:

This has been quite troubling for me when focusing on the error logs.

Motivation and Context

Support for print log levels.
Support for filter message by log level.

How to test this PR?

before:

after:
mc admin logs local --level error

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Optimization (provides speedup with no functional changes)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• Fixes a regression (If yes, please add commit-id or PR # here)
• Unit tests added/updated
• Internal documentation updated
• Create a documentation update request here