Add hostPath volume type

[saad-ali]

Feature Description

• One-line feature description (can be used as a release note): Extend hostPath volumes to prevent the "silent and implicit creation of directories on the host".
• Primary contact (assignee): @dixudx
• Responsible SIGs: /sig-storage
• Design proposal link (community repo): proposals: Add Volume Hostpath "type" proposal kubernetes#34058
• Reviewer(s) - (for LGTM) recommend having 2+ reviewers (at least one from code-area OWNERS file) agreed to review. Reviewers from multiple companies preferred:
  @thockin
• Approver (likely from SIG/area to which feature belongs):
  @saad-ali
• Feature target (which target equals to which milestone):
  • Alpha release target (x.y):
  • Beta release target (x.y):
  • Stable release target (x.y): 1.8

[saad-ali]

Implementation kubernetes/kubernetes#46597

Storage-SIG work for 1.8 being tracked here: https://docs.google.com/spreadsheets/d/1t4z5DYKjX2ZDlkTpCnp18icRAQqOE85C1T1r2gqJVck/edit#gid=85624274

[dixudx]

/cc

[tamalsaha]

/cc @aerokite

[idvoretskyi]

@saad-ali FYI - I've assigned this feature to you, as @dixudx is not a member of Kubernetes org.

[idvoretskyi]

@saad-ali @kubernetes/sig-storage-feature-requests please, update the features tracking board with the relevant data.

[dixudx]

@saad-ali Shall we close this, since kubernetes/kubernetes#34058 has already been merged.

[luxas]

This should be kept open until v1.8 is out and this feature has all documentation, code, proposals, etc merged.

Where is the documentation PR?

[dixudx]

@luxas @saad-ali Add documentation PR kubernetes/website#5503. PTAL. Thanks.

[luxas]

This can now be closed. Thanks @dixudx for completing this task!