Enable model registry feature by default

[mturley]

Closes RHOAIENG-12588.
Should not be merged until all other Model Registry MVP dev issues are closed. At time of writing, these are the only issues remaining:

• https://issues.redhat.com/browse/RHOAIENG-13045
• https://issues.redhat.com/browse/RHOAIENG-10135

Description

Changes the default value of the disableModelRegistry feature flag to false in anticipation of the Model Registry MVP tech preview release.

How Has This Been Tested?

Test Impact

Request review criteria:

Self checklist (all need to be checked):

• The developer has manually tested the changes and verified that the changes work
• Testing instructions have been added in the PR body (for PRs involving changes that are not immediately obvious).
• The developer has added tests or explained why testing cannot be added (unit or cypress tests for related changes)

If you have UI changes:

• Included any necessary screenshots or gifs if it was a UI change.
• Included tags to the UX team if it was a UI/UX change.

After the PR is posted & before it merges:

• The developer has tested their solution on a cluster by using the image produced by the PR to main

[mturley]

/hold
Holding this until the other MVP issues are closed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 84.87%. Comparing base (47aabd3) to head (084c8cb).
Report is 11 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3259      +/-   ##
==========================================
+ Coverage   84.84%   84.87%   +0.02%     
==========================================
  Files        1299     1299              
  Lines       28920    28920              
  Branches     7771     7771              
==========================================
+ Hits        24538    24545       +7     
+ Misses       4382     4375       -7     

see 5 files with indirect coverage changes

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[YuliaKrimerman]

/ lgtm

[manaswinidas]

/lgtm

[mturley]

/unhold

[openshift-ci]

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