Feature: Implementation of ConstantArray and SparseArray canonicalize for FixedSizeList

[connortsui20]

Tracking Issue: #4372

See title. This PR is mostly tests.

[codspeed-hq]

CodSpeed Performance Report

Merging #4545 will degrade performances by 18.8%

_{Comparing ct/fsl-impls (4a3bcdb) with develop (b15cca0)}

Summary

⚡ 1 improvements
❌ 1 regressions
✅ 1349 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	new_bp_prim_test_between[i16, 2048]	42.7 µs	36.6 µs	+16.56%
❌	new_raw_prim_test_between[i32, 2048]	25.5 µs	31.4 µs	-18.8%

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 88.99%. Comparing base (696233a) to head (4a3bcdb).
⚠️ Report is 4 commits behind head on develop.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.