Remove legacy `BomUploadProcessingTask`

[nscuro]

Description

Removes the legacy BomUploadProcessingTask.

• Makes the new implementation (previously known as BomUploadProcessingTaskV2) the default
• Removes code related to the legacy implementation
• Removes the experimental:bom.processing.task.v2.enabled property

Addressed Issue

N/A

Additional Details

N/A

Checklist

• [x] I have read and understand the contributing guidelines
• ~This PR fixes a defect, and I have provided tests to verify that the fix is effective~
• ~This PR implements an enhancement, and I have provided tests to verify that it works as intended~
• ~This PR introduces changes to the database model, and I have added corresponding update logic~
• ~This PR introduces new or alters existing behavior, and I have updated the documentation accordingly~

[codacy-production[bot]]

Coverage summary from Codacy

See diff coverage on Codacy

Coverage variation	Diff coverage
:white_check_mark: -0.30% (target: -1.00%)	:white_check_mark: 89.66% (target: 70.00%)

Coverage variation details

| | Coverable lines | Covered lines | Coverage | | ------------- | ------------- | ------------- | ------------- | | Common ancestor commit (94a73787055ad5c9a9dccf4cef929d0ebbed0d86) | 22015 | 16735 | 76.02% | | | Head commit (2d8769c156bcb5549ef1cc1f1e95584f68c7dbdf) | 21630 (-385) | 16377 (-358) | 75.71% (**-0.30%**) | **Coverage variation** is the difference between the coverage for the head and common ancestor commits of the pull request branch: ` - `

Diff coverage details

| | Coverable lines | Covered lines | Diff coverage | | ------------- | ------------- | ------------- | ------------- | | Pull request (#3722) | 406 | 364 | **89.66%** | **Diff coverage** is the percentage of lines that are covered by tests out of the coverable lines that the pull request added or modified: `/ * 100%`

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