Update Community Devfile Registry to use Go 1.19

[michael-valdron]

Which area/kind this issue is related to?

/area registry

Issue Description

To meet the objective of #1237, we need to ensure our devfile community registry build and deployment workflows is using Go 1.19.

Acceptance Criteria

• Update all go.mod files under the test modules to use Go 1.19
• Refactor all library calls to io/ioutil since it is now deprecated
• Update all dockerfiles and workflows to use Go 1.19
• Unfreeze devfile-index-base and index/generator
  • Important: See Freeze devfile-index-base at ffc3a09 registry#316 and Freeze index/generator at v1.1.0 registry#317 for changes to revert
• Update OpenShift prow jobs to use Go 1.19
• Update requirements under documentation

[michael-valdron]

Update all go.mod files under the test modules to use Go 1.19
Refactor all library calls to io/ioutil since it is now deprecated

These are already done, see the following PRs:

• Update tests golang and devfile library version registry#265
• Upgrade rhtap test to use go 1.19 registry#313

[Jdubrick]

Openshift PR opened here: openshift/release#49735
Registry PR opened here: devfile/registry#318