[next] Update config schema to improve IntelliSense

[t1m0thyj]

⚠️ Publish #748 to @next tag before merging this PR

• Fix Add Intellisense to secure array in zowe.config.json zowe-cli#1187
  • Breaking change because prefixItems property parsed by loadSchema for the secure array was renamed to items
• Fix Hover over zowe V2 profile in VSCode is incorrect zowe-cli#1303
  • Breaking change because if.properties.type parsed by loadSchema can now be false rather than an object
• Add enum to schema for profiles.XXX.type so that IntelliSense suggests known profile types
• Improve description for config JSON properties so that IntelliSense shows more helpful tooltips
• Get engineering review of schema changes (see comment below)
  • Remove duplicate values from IntelliSense suggestions for secure array
  • Fix VS Code not underlining unknown value for type property
• Add optional autoStore boolean property to schema? Yes
• Add experimental plugins array property to schema? No
• Get docs review of new descriptions (IntelliSense tooltips)
• Update old ($version < 4) schemas used in tests
• Update changelog

[t1m0thyj]

Investigated the following comments from engineering review:

• Remove duplicate values from IntelliSense suggestions for secure array

  This seems like a VS Code limitation, since we are defining enough info for jsonschemavalidator.net to detect this:
  

• Fix VS Code not underlining unknown value for type property

  This also seems like a VS Code limitation, since we are defining enough info for IntelliJ to provide tips about this:
  

[codecov]

Codecov Report

Merging #751 (e6d2fcb) into next (364a586) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             next     #751   +/-   ##
=======================================
  Coverage   88.85%   88.85%           
=======================================
  Files         197      197           
  Lines       10301    10302    +1     
  Branches     1978     1979    +1     
=======================================
+ Hits         9153     9154    +1     
  Misses       1144     1144           
  Partials        4        4           

Impacted Files	Coverage Δ
packages/config/src/ProfileInfo.ts	96.33% <ø> (ø)
packages/config/src/ConfigSchema.ts	100.00% <100.00%> (ø)

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[awharn]

LGTM!

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

95.8% Coverage
0.0% Duplication

[zFernand0]

Thanks for updating the newly introduced schemas.
Much appreciated! 😋