add metadata to the uploaded test runner binary (#4092)

* move s3 api helpers into own TS file

* add demo file

* add comments

* add method to set user metadata by copying it

* set checksum metadata on uploaded binary

* move checksum to the right upload file

* call the right method

* fix require from ts

* convert size to string

* needs extension

* test binary against other projects

* set checksums as headers during first upload

* Revert "set checksums as headers during first upload"

This reverts commit 2043d9ee1f.

* set ACL to public-read when setting metadata on binary

* linting

* pass content-type

* update scripts tests

* linting

* add --platformArch parameter

scripts/unit/binary/s3-api-spec.js

@@ -0,0 +1,26 @@
+const la = require('lazy-ass')
+
+/* eslint-env mocha */
+describe('s3-api', () => {
+  context('hasOnlyStringValues', () => {
+    const { hasOnlyStringValues } = require('../../binary/s3-api')
+
+    it('returns true if object has only string values', () => {
+      const o = {
+        foo: 'bar',
+        baz: 'baz',
+      }
+
+      la(hasOnlyStringValues(o))
+    })
+
+    it('returns false if object has non-string value', () => {
+      const o = {
+        foo: 'bar',
+        baz: 42,
+      }
+
+      la(!hasOnlyStringValues(o))
+    })
+  })
+})