Fix broken `mc anonymous get/get-json`

[subnix]

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

mc anonymous get/get-json have been broken by PR #4745, because it tries to guess an operation and fails before finding one. So we can avoid this by explicit operation handling.

How to test this PR?

mc anonymous get [target] mc anonymous get-json [target]

Types of changes

• [x] 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:

• [x] Fixes a regression (PR #4745)
• [ ] Unit tests added/updated
• [ ] Internal documentation updated
• [ ] Create a documentation update request here

[subnix]

Oh, now I see fix f78f391f8beda947fbdbb1d9f22edc90af3fcc32, but it hasn't been completely fixed. It doesn't work if file/directory named TARGET exists.

mkdir -p play/upload
mc anonymous get play/upload