fix(#6854): [LADTableSet] prevent compositions from becoming reactive

[ozyx]

Closes #6854

Describe your changes:

Declare and initialize this.compositions in the created() hook rather than data() so that objects added to it do not become reactive, and thus can access their own private class methods.

All Submissions:

• Have you followed the guidelines in our Contributing document?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?
• Is this change backwards compatible? For example, developers won't need to change how they are calling the API or how they've extended core plugins such as Tables or Plots.

Author Checklist

• Changes address original issue?
• Tests included and/or updated with changes?
• Command line build passes?
• Has this been smoke tested?
• Testing instructions included in associated issue OR is this a dependency/testcase change?

Reviewer Checklist

• Changes appear to address issue?
• Reviewer has tested changes by following the provided instructions?
• Changes appear not to be breaking changes?
• Appropriate automated tests included?
• Code style and in-line documentation are appropriate?
• Has associated issue been labelled unverified? (only applicable if this PR closes the issue)
• Has associated issue been labelled bug? (only applicable if this PR is for a bug fix)

[codecov]

Codecov Report

Merging #6855 (6f48efa) into master (3c2b032) will increase coverage by 0.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #6855      +/-   ##
==========================================
+ Coverage   48.16%   48.19%   +0.02%     
==========================================
  Files         643      643              
  Lines       25618    25619       +1     
  Branches     2507     2507              
==========================================
+ Hits        12340    12347       +7     
+ Misses      12801    12795       -6     
  Partials      477      477              

Flag	Coverage Δ		*Carryforward flag
e2e-full	41.97% <ø> (ø)		Carriedforward from 349b909
e2e-stable	56.83% <ø> (+0.67%)	⬆️
unit	38.72% <0.00%> (+<0.01%)	⬆️

*This pull request uses carry forward flags. Click here to find out more.

Files Changed	Coverage Δ
src/plugins/LADTable/components/LadTableSet.vue	45.54% <0.00%> (+0.54%)	⬆️

... and 2 files with indirect coverage changes

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 3c2b032...6f48efa. Read the comment docs.

[deploysentinel]

Current Playwright Test Results Summary

✅ 14 Passing

Run may still be in progress, this comment will be updated as current testing workflow or job completes...

(Last updated on 07/28/2023 07:18:34pm UTC)

Run Details

Running Workflow e2e-couchdb on Github Actions

Commit: 6f48efa

Started: 07/28/2023 07:16:38pm UTC

View Detailed Build Results

---

Current Playwright Test Results Summary

✅ 131 Passing - ⚠️ 1 Flaky

Run may still be in progress, this comment will be updated as current testing workflow or job completes...

(Last updated on 07/28/2023 07:18:34pm UTC)

Run Details

Running Job e2e-stable on CircleCI

Commit: 6f48efa

Started: 07/28/2023 07:11:14pm UTC

⚠️ Flakes

📄   functional/plugins/conditionSet/conditionSet.e2e.spec.js • 1 Flake

Test Case Results

Test Case	Last 7 days Failures	Last 7 days Flakes
Basic Condition Set Use ConditionSet should output blank instead of the default value Retry 2 • Retry 1 • Initial Attempt	12.07% (7) 7 / 58 runs failed over last 7 days	29.31% (17) 17 / 58 runs flaked over last 7 days

---

View Detailed Build Results

---

[jvigliotta]

Nice! Good catch!