Add anonymize flag to support-diag

[anjalshireesh]

Community Contribution License

All community contributions in this pull request are licensed to the project maintainers
under the terms of the [Apache 2 license] (https://www.apache.org/licenses/LICENSE-2.0).
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

minio will now not anonymize hostnames by default. This is the "standard" mode of
anonymization. If user wants them to be anonymized, then they must pass --anonymize=strict

Motivation and Context

Retaining hostnames makes debugging easier.

How to test this PR?

• Generate health report without passing --anonymize
• Verify that hostnames are retained in the generated report
• Verify same behavior by passing --anonymize=standard
• Generate health report by passing --anonymize=strict
• Verify that hostnames are anonymized in the generated report

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

[shtripat]

LGTM. Verified.