[proposal] Support creating directories on erasure coded backend

[harshavardhana]

Description

Support creating directories on erasure coded backend

Motivation and Context

This PR continues from #5049 where we started supporting
directories for filesystem backend.

How Has This Been Tested?

Manually using awscli tests on mint for the same feature on FS backend.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added unit tests to cover my changes.
• I have added/updated functional tests in mint. (If yes, add mint PR # here: )
• All new and existing tests passed.

[harshavardhana]

To test please use the commit before a recent merge to remove the awscli test to test directory creates. https://github.com/minio/mint/commits/master

docker run --net=host -e SERVER_ENDPOINT=127.0.0.1:9000 -e ACCESS_KEY=minio -e SECRET_KEY=minio123 -e ENABLE_HTTPS=0 -e MINT_MODE=full minio/mint:edge awscli
Running with
SERVER_ENDPOINT: 127.0.0.1:9000
ACCESS_KEY:      minio
SECRET_KEY:      ***REDACTED***
ENABLE_HTTPS:    0
SERVER_REGION:   us-east-1
MINT_DATA_DIR:   /mint/data
MINT_MODE:       full

To get logs, run 'sudo docker cp ecaa38ce02e7:/mint/log /tmp/mint-logs'
(1/1) Running awscli tests ... done in 40 seconds

All tests ran successfully

[codecov]

Codecov Report

Merging #5306 into master will increase coverage by 3.56%.
The diff coverage is 75.94%.

@@            Coverage Diff             @@
##           master    #5306      +/-   ##
==========================================
+ Coverage    62.4%   65.97%   +3.56%     
==========================================
  Files         201      144      -57     
  Lines       31114    24087    -7027     
==========================================
- Hits        19418    15892    -3526     
+ Misses      10256     6945    -3311     
+ Partials     1440     1250     -190

Impacted Files	Coverage Δ
cmd/object-api-input-checks.go	94.94% <100%> (ø)	⬆️
cmd/fs-v1.go	76.13% <100%> (-2.37%)	⬇️
cmd/xl-v1-object.go	77.25% <71.42%> (-1.84%)	⬇️
cmd/posix.go	70.99% <88.88%> (-3.1%)	⬇️
cmd/storage-rpc-client.go	36.63% <0%> (-38.12%)	⬇️
cmd/update-notifier.go	58.33% <0%> (-23.34%)	⬇️
cmd/storage-rpc-server.go	52.63% <0%> (-23.31%)	⬇️
cmd/posix-errors.go	51.66% <0%> (-16.67%)	⬇️
cmd/xl-v1-healing.go	70.83% <0%> (-15.21%)	⬇️
cmd/namespace-lock.go	65.36% <0%> (-13.66%)	⬇️
... and 109 more

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[harshavardhana]

this is blocked on @abperiasamy // cc @nitisht

[harshavardhana]

Closing PR and re-opening again.

[balamurugana]

mint-xl.sh: PASSED
---
mint-fs.sh: PASSED
---
mint-dist-xl.sh: PASSED
---