Moving the tier naming content from Learn to Contribute

[abhatt-rh]

TELCODOCS-1520: This PR moves the tier naming content from Learn to Contribute content type

Issue: https://issues.redhat.com/browse/TELCODOCS-1520:

Preview: http://373.docs-pr.validatedpatterns.io/contribute/about-pattern-tiers-types/

[mbaldessari]

This is an automated message:

You can preview this docs PR at http://373.docs-pr.validatedpatterns.io
Note that they get generated every five minutes, so please wait a bit.

[beekhof]

Do we need to add aliases for this past location?

[abhatt-rh]

@danmacpherson Kindly review these changes for moving the tier naming content from Learn to Contribute. Again, the htmltest is failing but the changes implemented with this PR work fine locally.

[openshift-merge-robot]

PR needs rebase.

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[openshift-ci]

@abhatt-rh: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
ci/prow/build-preview	02c7f5e	link	true	/test build-preview

Full PR test history. Your PR dashboard.

Details

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