MPT-14767 E2E seeding proof of concept

[albertsola]

• Added seeding proof of concept
• Fix create product request

[github-actions]

	Warnings
⚠️	This PR changes 1402 lines across 29 files (threshold: 600). Please consider splitting it into smaller PRs for easier review.
⚠️	Some newly added source files do not have corresponding tests in the tests/ folder with matching structure and the test_ prefix.

✅ Found Jira issue key in the title: MPT-14767

Tests mirroring check (created files only)

Added source file	Expected test (added in this PR)
seed/catalog/catalog.py	tests/catalog/test_catalog.py
seed/catalog/item.py	tests/catalog/test_item.py
seed/catalog/item_group.py	tests/catalog/test_item_group.py
seed/catalog/product.py	tests/catalog/test_product.py
seed/catalog/product_parameters.py	tests/catalog/test_product_parameters.py
seed/catalog/product_parameters_group.py	tests/catalog/test_product_parameters_group.py
seed/container.py	tests/test_container.py
seed/context.py	tests/test_context.py
seed/defaults.py	tests/test_defaults.py
seed/main.py	tests/test_main.py
seed/seed_api.py	tests/test_seed_api.py

Generated by 🚫 dangerJS against cb8f666

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud