✨ Upload files instead of multi-part form.

[jortel]

Upload manifest file instead of using multi-part form.
Much simpler and more easily supports the addon staging the issues and deps files on disk rather than streaming. The more atomic approach will prevent transaction deadlock which can more easily occur when the addon-analyzer builder reported an error (which it should never do).

The uploaded file contains markers used to delimited the documents.
^] = \x1D = GS (group separator).

^]BEGIN-MAIN^]
---
commit: 1234
^]END-MAIN^]
^]BEGIN-ISSUES^]
---
ruleset: ruleset-1
rule: rule-1
incidents:
...
^]END-ISSUES^]
^]BEGIN-DEPS^]
---
name: github.com/jboss
version: 4.0
labels:
- konveyor.io/language=java
- konveyor.io/otherA=dog
^]END-DEPS^]

Flow:

1. post (upload) manifest.yaml file.
2. post ref to the manifest file.
3. delete manifest file.

Orphaned files will be reaped.

---

The binding client needed to be updated to handle different file encoding (MIME).

[mansam]

What changed in the new migration?