ci: Migrate to GH Actions for release

[SevInf]

Moves and finishes the work Joël did in https://github.com/prisma/prisma-engines-builds.

For release process, this gets rid of both buildkite and engineer.

In order to migrate all tests that were running on buildkite to GH Actions we had to into nested job per connector - otherwise, matrix exceeded 256 jobs limit.

Otherwise, it works more or less identical to how engineer did with a couple of exceptions:

• Each OS gets built as a separate GH Actions job, results are uploaded as artifacts
• Once all jobs for commit are finished, all artifacts get collected, uploaded to R2/S3 and verified in one step (engineer did it file by file).
• It is possible to trigger interation version on non-integration branch by putting [integration] into the commit message.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
1 out of 3 committers have signed the CLA.

✅ SevInf
❌ janpio
❌ Jolg42
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[codspeed-hq]

CodSpeed Performance Report

Merging #4947 will not alter performance

_{Comparing feat/gh-actions (1249e88) with main (68bfdeb)}

Summary

✅ 11 untouched benchmarks

[github-actions]

WASM Query Engine file Size

Engine	This PR	Base branch	Diff
Postgres	2.056MiB	2.056MiB	0.000B
Postgres (gzip)	820.650KiB	820.650KiB	0.000B
Mysql	2.025MiB	2.025MiB	0.000B
Mysql (gzip)	808.058KiB	808.058KiB	0.000B
Sqlite	1.918MiB	1.918MiB	0.000B
Sqlite (gzip)	765.962KiB	765.961KiB	1.000B

[SevInf]

/integration

[SevInf]

Do not merge until Buildkite pipelines are disabled.

[SevInf]

Without orderBy, this produced different order on Postgres 9

[Weakky]

Amazing work 🎉 cc @Jolg42