add helper text for default value sensitive information

[christianvogt]

Description

Add helper text to default values to guide the user to not store sensitive information in default values.

How Has This Been Tested?

• enable the connection types feature flag
• create a connection type
• add a field
• observe the helper text below the default value

Test Impact

N/A

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

cc @simrandhaliw

[simrandhaliw]

LGTM!

[andrewballantyne]

lgtm -- didn't run it, I have faith in a text addition 🙂

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andrewballantyne

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• frontend/OWNERS [andrewballantyne]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.65%. Comparing base (85e63ce) to head (e5ffa7c).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3450      +/-   ##
==========================================
+ Coverage   85.60%   85.65%   +0.05%     
==========================================
  Files        1347     1347              
  Lines       30642    30642              
  Branches     8521     8521              
==========================================
+ Hits        26231    26247      +16     
+ Misses       4411     4395      -16     

Files with missing lines	Coverage Δ
...connectionTypes/manage/DataFieldPropertiesForm.tsx	80.00% <ø> (ø)

... and 4 files with indirect coverage changes

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